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3500 ACT Vocabulary (7)

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hackneyed
haggard
halting
handicap
haphazard
harangue
harbinger
hardy
harness
harrowing
harshness
harvest
haste
haughtiness
haul
hay
haze
headlong
heaven
heckler
hedonist
heedless
hegemony
heighten
helium
helpful
hem
hemisphere
herbivorous
herculean
herd
heredity
heresy
heretical
heritage
hermetic
hermitage
heterodox
heterogeneous
heyday
hibernal
hibernate
hierarchy
highlight
hilarity
hindrance
hinterland
histrionic
hoard
hoary
hodgepodge
homogeneous
homogenize
hoodwink
horde
horizontal
horned
hornet
horticultural
hospitable
hovel
hover
hubris
hue
hulking
humanity
humdrum
humid
hurtle
hydrophobia
hyperbole
hypercritical
hypersensitive
hypochondriac
ichthyology
iconoclastic
identical
identity
ideology
idiom
idiosyncrasy
idolatry
idyllic
ignite
ignoble
ignominy
ignorance
ignore
illimitable
illusory
imbalance
imbibe
imbue
imitation
immense
immobility
immutable
impact
impair
impale
impalpable
impartially
impassable
impassive
impeach
impecunious
impede
impel
impenitent
imperative
imperceptible
imperious
impermeable
impersonal
impertinent
imperturbable
impervious
impetuous
impetus
impiety
impinge
impious
implacable
implausible
implicit
imply
importunate
importune
imposing
impoverished
imprecation
impregnable
imprint
impropriety
improvident
imprudent
impudence
impugn
impulsive
impunity
impute
inability
inadvertent
inalienable
inarticulate
inaugurate
incandescent
incapacitate
incarcerate
incarnadine
incarnation
incendiary
incense
inception
inchoate
incidence
incidental
incipient
incisive
incite
inclement
incline
inclusive
incoherent
incompatible
incongruous
inconsequential
inconsistency
incontinent
incontrovertible
incorporeal
incredulity
incredulous
increment
incrustation
incubate
inculcate
incursion
indefatigable
indefinitely
indelible
indent
indentation
indented
indenture
indeterminate
index
indict
indifferent
indigent
indignity
indiscriminate
indiscriminately
indispensable
indisputable
indissoluble
indoctrinate
indolent
indomitable
indubitable
inebriated
ineffable
inefficacious
inequity
inert
inexorable
infer
infidel
infinitesimal
infirmary
infirmity
inflate
inflict
influential
influx
inform
informative
informed
infraction
infuriate
infuse
infusion
ingeniously
ingenue
ingenuous
ingrained
ingratiate
ingredient
inherent
inhibit
inimical
inimitable
iniquitous
initial
initially
injurious
innocuous
innovation
innovative
inoffensive
inopportune
inordinate
inquest
inquiry
inquisitor
insalubrious
inscribe
inscrutable
insensate
insensible
insert
insipid
insolence
insolvent
inspection
inspector
inspire
instantaneous
instigate
instil
instill
instinct
institute
institution
instruction
insubstantial
insular
insularity
insulated
insulation
insulin
insuperable
insurgent
insurmountable
intangible
integral
integrate
integrated
intelligent
intelligentsia
intemperate
intense
interact
interdependence
interfere
interior
interlocutor
interloper
interment
interminable
intermittent
internal
internecine
interpretation
interregnum
intervention
intimate
intoxication
intractable
intransigence
intrepid
intrinsic
introspective
intrusion
inundate
inure
inured
invalidate
invective
inverse
invert
invertebrate
investigate
investigation
inveterate
invidious
invigorate
inviolable
invocation
irascible
ire
iridescent
irksome
irony
irradiate
irreconcilable
irrefutable
irregularly
irremediable
irrepressible
irreproachable
irresolute
irretrievable
irreverence
irreverent
irreversible
irrevocable
irritable
irritating
itinerant


hackneyed: Read  repeated too often; over familiar through overuse

haggard: Read  wasted away; showing wearing effects of overwork or suffering

halting: Read  hesitant; faltering; imperfect or defective

handicap: Read  disadvantage; physical disability; cripple; hinder; impede

haphazard: Read  not thorough, constant or consistent; by chance

harangue: Read  noisy speech; speech or piece of writing with strong feeling or expression

harbinger: Read  forerunner; an indication of approach of something or someone

hardy: Read  in robust and good health; able to survive under unfavorable conditions

harness: Read  gear or tackle with which a draft animal pulls a vehicle or implement; something resembling gear or tackle, as straps

harrowing: Read  agonizing; distressing extremely painful

harshness: Read  quality or condition of being harsh; excessive sternness

harvest: Read  gather; yield from plants in a single growing season

haste: Read  hurry; rapidity of action or motion

haughtiness: Read  pride; arrogance; highness or loftiness

haul: Read  draw slowly or heavily; pull or drag forcibly; shift direction

hay: Read  grass or other plants, cut and dried for fodder

haze: Read  fog; mist; partially opaque covering; vague or confused state of mind

headlong: Read  uncontrollably forceful or fast; done with head leading; headfirst

heaven: Read  expanse of space surrounding the earth; sky; place where the sun, moon, and stars appear

heckler: Read  one who harasses others;one who tries to embarrass others with questions and objections

hedonist: Read  one who believes that pleasure is the sole aim in life

heedless: Read  unaware, without noticing; unmindful or thoughtless

hegemony: Read  domination, influence, or authority over another, especially by political group or nation over others

heighten: Read  enhance; hoist; raise or increase the quantity or degree of; intensify

helium: Read  kind of gas they were using to fill the balloon

helpful: Read  giving aid; assistant; useful; salutary

hem: Read  edge or border on a piece of cloth, especially a finished edge

hemisphere: Read  halves; half of a sphere bounded by a great circle

herbivorous: Read  grain-eating; plant-eating; feeding only on plants

herculean: Read  displaying superhuman strength or power; of extreme difficulty

herd: Read  flock; crowd; group of cattle or other domestic animals

heredity: Read  genetics; inheritance; genetic transmission of characteristics from parent to offspring

heresy: Read  opinion contrary to popular belief; opinion contrary to accepted religion

heretical: Read  departing from accepted beliefs or standards; oppositional

heritage: Read  legacy; something that is passed down from preceding generations; a tradition

hermetic: Read  sealed by fusion so as to be airtight

hermitage: Read  place where one can live in seclusion; home of one isolated from society for religious reasons

heterodox: Read  unorthodox; unconventional; not in agreement with accepted beliefs, especially in church doctrine

heterogeneous: Read  consisting of dissimilar elements or parts; completely different

heyday: Read  period of greatest popularity, success, or power; golden age

hibernal: Read  wintry; belonging or relating to winter

hibernate: Read  sleep throughout winter; be in inactive or dormant state

hierarchy: Read  arrangement by rank or standing; series in which each element is graded or ranked

highlight: Read  make prominent; emphasize; stress

hilarity: Read  great enjoyable or amusing activity

hindrance: Read  something that holds back or causes problems with something else; obstacle

hinterland: Read  region; remote and undeveloped area

histrionic: Read  characteristic of acting or stage performance

hoard: Read  stockpile; accumulate for future use

hoary: Read  gray or white with or as if with age; covered with grayish hair

hodgepodge: Read  jumble; mixture of ill-suited elements; something made up of miscellaneous

homogeneous: Read  of the same or similar nature or kind

homogenize: Read  equalize; become similar, as by mixing

hoodwink: Read  deceive; take in by deceptive means; delude

horde: Read  a large group or crowd; wandering troop or gang; a moving crowd

horizontal: Read  flat; level; parallel to or in a base line

horned: Read  having horn, or hornlike parts

hornet: Read  large stinging paper wasp; insect of the wasp family

horticultural: Read  pertaining to cultivation of gardens or orchards

hospitable: Read  disposed to treat guests with warmth and generosity; receptive

hovel: Read  shack; small, wretched house

hover: Read  hang about; wait nearby; remain floating

hubris: Read  excessive pride or self-confidence

hue: Read  color; appearance; particular gradation of color

hulking: Read  massive; bulky; great in size

humanity: Read  kindness; virtue; all of the inhabitants of the earth

humdrum: Read  lacking variety or excitement; monotonous

humid: Read  containing a high amount of water or water vapor

hurtle: Read  crash; move with or as if with great speed and rushing noise

hydrophobia: Read  rabies, especially in human beings; abnormal fear of water

hyperbole: Read  figure of speech in which exaggeration is used for emphasis; overstatement

hypercritical: Read  excessively exacting; inclined to judge too severely

hypersensitive: Read  having an allergy or peculiar or excessive susceptibility

hypochondriac: Read  patient with imaginary symptoms and ailments; one who is morbidly anxious about his health, and generally depressed

ichthyology: Read  branch of zoology that deals with study of fishes

iconoclastic: Read  attacking cherished traditions; characterized by attack on established beliefs

identical: Read  duplicate; alike; being the exact same one

identity: Read  exact sameness; distinct personality of an individual regarded as a persisting entity

ideology: Read  study of origin and nature of ideas

idiom: Read  expression whose meaning differs from meanings of its individual words; distinctive style

idiosyncrasy: Read  behavioral attribute that is distinctive and peculiar to an individual

idolatry: Read  worship of idols; excessive admiration

idyllic: Read  excellent and delightful in all respects

ignite: Read  kindle; cause to start burning; set fire to

ignoble: Read  of lowly origin; not noble in quality, character, or purpose; unworthy

ignominy: Read  deep disgrace; shame or dishonor

ignorance: Read  lack of knowledge or education

ignore: Read  refuse to pay attention to; disregard; overlook; neglect

illimitable: Read  without limits in extent, size, or quantity

illusory: Read  deceptive or tending of deceive; not real

imbalance: Read  lack of balance or symmetry; disproportion

imbibe: Read  drink in; absorb or take in as if by drinking

imbue: Read  inspire or influence thoroughly; stain or dye deeply or completely

imitation: Read  emulation; copying the actions of someone else

immense: Read  enormous; boundless; so great as to be beyond measurement

immobility: Read  quality of not moving; remaining in place

immutable: Read  unable to be changed without exception; not mutable

impact: Read  forceful consequence; strong effect; influencing strongly

impair: Read  injure or hurt; become worse; affect negatively

impale: Read  pierce; kill by piercing with a spear or sharp

impalpable: Read  difficult to perceive senses or mind

impartially: Read  fairly; in an impartial manner

impassable: Read  not able to be traveled or crossed

impassive: Read  without feeling; revealing little emotion or sensibility; not easily aroused or excited

impeach: Read  make an accusation against; challenge or discredit the credibility of

impecunious: Read  without money; poor; penniless

impede: Read  hinder; charge with improper conduct; challenge validity of; try to discredit

impel: Read  drive or force onward; drive forward; urge to action through moral pressure

impenitent: Read  impervious to moral persuasion; of hard heart

imperative: Read  having power command or control; critically importance; some duty that is essential and urgent

imperceptible: Read  impossible or difficult to perceive by the mind or senses

imperious: Read  urgent or pressing; able to deal authoritatively; dictatorial

impermeable: Read  not allowing passage, especially of liquids; waterproof

impersonal: Read  having no personal preference; objective

impertinent: Read  improperly forward or bold; rude

imperturbable: Read  unshakably calm; placid; incapable of being disturbed or disconcerted

impervious: Read  impenetrable; incapable of being damaged or distressed

impetuous: Read  marked by sudden and violent force; hasty; impulsive and passionate

impetus: Read  incentive; stimulus; force or energy associated with a moving body

impiety: Read  irreverence; lack of respect for God

impinge: Read  infringe; advance beyond usual limit; make physical impact on; touch

impious: Read  irreverent; lacking due respect or dutifulness

implacable: Read  incapable of being pacified; not to be relieved;

implausible: Read  unlikely; difficult to believe; dubious

implicit: Read  implied or understood though not directly expressed

imply: Read  express or indicate indirectly; signify

importunate: Read  urging; demanding; expressing earnest entreaty

importune: Read  beg persistently; ask for urgently or repeatedly; annoy

imposing: Read  adapted to impress forcibly; impressive; impressive in appearance

impoverished: Read  poor; reduced to poverty; deprived of natural richness or strength

imprecation: Read  curse; act of calling down a curse that invokes evil

impregnable: Read  invulnerable; able to withstand attack

imprint: Read  impression produced by pressure or printing; distinctive influence; impress firmly in the mind

impropriety: Read  improper act; improper or unacceptable usage in speech or writing

improvident: Read  thriftless; not providing for future; incautious

imprudent: Read  lacking caution; injudicious; not attentive to consequence

impudence: Read  offensively bold behavior; trait of being rude

impugn: Read  dispute or contradict, often in insulting way; challenge

impulsive: Read  having power of driving or impelling; giving an impulse; moving; impellent

impunity: Read  freedom from punishment or harm; exemption from injury, suffering, or discomfort

impute: Read  lay responsibility or blame for, often unjustly

inability: Read  lack of ability, especially mental ability, to do something

inadvertent: Read  not intentional; not on purpose; careless; negligent; inattentive

inalienable: Read  not to be taken away; nontransferable

inarticulate: Read  speechless; without or deprived of the use of speech or words

inaugurate: Read  start; initiate; induct into office by formal ceremony

incandescent: Read  strikingly bright; shining with intense heat; emitting light as result of being heated

incapacitate: Read  disable or disqualify; deprive of capacity or natural power

incarcerate: Read  imprison; put into jail; shut up or enclose

incarnadine: Read  red, especially blood red; of blood red color of raw flesh

incarnation: Read  person or thing regarded as embodying or exhibiting some quality, idea

incendiary: Read  arsonist; bomb that is designed to start fires

incense: Read  enrage; infuriate; cause to be extremely angry

inception: Read  beginning of something; taking in, as by swallowing; process of receiving within

inchoate: Read  recently begun; imperfectly formed or developed; elementary

incidence: Read  rate of occurrence; particular occurrence

incidental: Read  happening, as occasional event, without regularity; coming without design

incipient: Read  beginning to exist or appear; in an early stage

incisive: Read  penetrating, clear, and sharp, as in operation or expression

incite: Read  arouse to action; motivate; induce to exist

inclement: Read  stormy; showing no mercy; physically severe

incline: Read  cause to lean, slant, or slope; deviate from the horizontal or vertical

inclusive: Read  tending to include all; taking a great deal or everything within its scope

incoherent: Read  lacking cohesion, connection, or harmony; unable to think in clear manner

incompatible: Read  inharmonious; impossible to coexist; not easy to combine harmoniously

incongruous: Read  not fitting; lacking in harmony or compatibility

inconsequential: Read  insignificant; lacking importance; not following from premises or evidence; illogical

inconsistency: Read  state of being self-contradictory; lack of uniformity or steadiness

incontinent: Read  lacking self-restraint; lacking sexual restraint; unchaste

incontrovertible: Read  indisputable; not open to question

incorporeal: Read  not consisting of matter, or not having material body; immaterial; insubstantial

incredulity: Read  disbelief; doubt about the truth of something

incredulous: Read  difficult to believe; incredible; skeptical

increment: Read  process of increasing in number, size, quantity, or extent

incrustation: Read  hard outer layer that covers something

incubate: Read  hatch; develop under favorable conditions

inculcate: Read  teach and impress by frequent repetitions

incursion: Read  aggressive entrance into foreign territory; raid or invasion

indefatigable: Read  tireless; showing sustained enthusiastic action

indefinitely: Read  endlessly; incessantly; for a long time, no end defined; forever

indelible: Read  impossible to remove, erase, or wash away; permanent

indent: Read  nick; set in from margin; impress or stamp

indentation: Read  concave cut into a surface or edge; small hollow or depression

indented: Read  cut in the edge into points or inequalities, like teeth; having an uneven, irregular border

indenture: Read  contract binding one party into the service of another for a specified term

indeterminate: Read  uncertain; not clearly fixed; indefinite

index: Read  sign; indication; something that serves to guide, point out

indict: Read  charge; accuse formally of a crime

indifferent: Read  having no particular interest or concern; being neither good nor bad

indigent: Read  poor; experiencing want or need; impoverished

indignity: Read  offensive or insulting treatment

indiscriminate: Read  choosing at random; not marked by fine distinctions

indiscriminately: Read  in unnoticing; randomly; in a random manner

indispensable: Read  essential; requisite; impossible to be omitted or remitted

indisputable: Read  not open to question; obviously true; beyond dispute or doubt

indissoluble: Read  permanent; impossible to dissolve, disintegrate, or decompose

indoctrinate: Read  teach with biased or one-sided ideology; teach doctrines to; teach uncritically

indolent: Read  lazy; slow to heal, grow, or develop; inactive

indomitable: Read  unconquerable; incapable of being overcome

indubitable: Read  unable to be doubted; unquestionable

inebriated: Read  under the influence of alcohol; intoxicated; drunk

ineffable: Read  unutterable; cannot be expressed in speech

inefficacious: Read  not effective; unable to produce a desired result

inequity: Read  unfairness; lack of equity or abstract justice; disagreement with equitable principles

inert: Read  inactive; lacking power to move; unable to move or act

inexorable: Read  not capable of being swayed; unyielding; implacable

infer: Read  deduce; conclude from evidence or premises; lead to as a consequence or conclusion

infidel: Read  one who does not hold same religious beliefs as another

infinitesimal: Read  very small; immeasurably or incalculably minute

infirmary: Read  health facility where patients receive treatment

infirmity: Read  weakness; bodily ailment or weakness, especially one brought on by old age

inflate: Read  expand; fill with air or gas; increase the amount or availability of

inflict: Read  impose something unpleasant; cause

influential: Read  important; powerful; having or exercising influence or power

influx: Read  flowing into; mass arrival or incoming

inform: Read  impart information to; make aware of something; be a pervasive presence in; animate

informative: Read  instructive; illustrative; providing or conveying information

informed: Read  having much knowledge or education

infraction: Read  violation of rule or regulation; breach; minor offence or petty crime

infuriate: Read  enrage; make furious or mad with anger

infuse: Read  introduce into the body through a vein; undergo the process of infusion

infusion: Read  act or process of infusing; introduction of a solution into person through vein for therapeutic purposes

ingeniously: Read  in an clever or skillful manner; in an ingenious manner

ingenue: Read  innocent girl or young woman; actress who plays such parts

ingenuous: Read  naive and trusting; young; unsophisticated

ingrained: Read  deeply established; firmly rooted

ingratiate: Read  become popular with; make agreeable or acceptable

ingredient: Read  element in a mixture or compound

inherent: Read  firmly established by nature or habit

inhibit: Read  restrain; prevent or forbid; hold back

inimical: Read  unfriendly; hostile; harmful; detrimental

inimitable: Read  matchless; not able to be imitated

iniquitous: Read  wicked or sinful; immoral; unrighteous

initial: Read  early; preliminary; occurring at the beginning

initially: Read  in the beginning; at first

injurious: Read  harmful; tending to injure or impair; abusive; insulting

innocuous: Read  having no adverse effect; harmless

innovation: Read  introduction of something new

innovative: Read  marked by or given to innovations; introducing a change

inoffensive: Read  harmless; innocent; giving no offense

inopportune: Read  untimely; poorly chosen; inconvenient; unseasonable; unsuitable

inordinate: Read  exceeding reasonable limits; excessive; not regulated; disorderly

inquest: Read  formal investigation, often held before a jury; judicial inquiry

inquiry: Read  investigation; search for knowledge

inquisitor: Read  questioner, especially who is excessively rigorous or harsh; investigator

insalubrious: Read  unwholesome; not healthful; not promoting health

inscribe: Read  write or engrave; mark down as something to be read; imprint; assign or address to

inscrutable: Read  impenetrable; not readily understood; mysterious

insensate: Read  lacking sensibility and understanding; foolish

insensible: Read  unconscious; unresponsive; very small or gradual

insert: Read  input; enter; put or set into, between, or among

insipid: Read  lacking flavor or zest; not tasty; dull

insolence: Read  scornful treatment; insulting speech or conduct

insolvent: Read  bankrupt; unable to repay one's debts

inspection: Read  formal or official examination

inspector: Read  high ranking police officer; investigator who observes carefully

inspire: Read  encourage; inspirit; fire the imagination of

instantaneous: Read  instant; immediate; occurring with no delay

instigate: Read  goad or urge forward; provoke; incite

instil: Read  enter drop by drop; infuse slowly

instill: Read  drop in; pour in drop by drop; impart gradually; infuse slowly; cause to be imbibed.

instinct: Read  inborn pattern of behavior ; nature

institute: Read  establish, organize, and set in operation

institution: Read  institute; organization; introducing something new

instruction: Read  direction; teaching; activities of educating or instructing

insubstantial: Read  lacking substance or reality; insignificant; frail; not firm or solid

insular: Read  of isolated people, especially having a narrow viewpoint

insularity: Read  narrow-mindedness; isolation; state of being isolated or detached

insulated: Read  set apart; isolated in restricted sense, so remote from other bodies

insulation: Read  act of insulating; separation; state of being detached, from other objects

insulin: Read  hormone secreted by the isles

insuperable: Read  incapable of being excelled; unbeatable

insurgent: Read  rising in revolt against established authority; rebelling against leadership of political party

insurmountable: Read  overwhelming; incapable of being passed over or overcome

intangible: Read  not able to be perceived by senses, as touch; vague

integral: Read  essential or necessary for completeness; entire

integrate: Read  make whole; combine; make into one unit

integrated: Read  formed into a whole; introduced into another entity

intelligent: Read  ingenious; wise; bright; having a high degree of intelligence; mentally acute

intelligentsia: Read  intelligent and educated elite, especially in nineteenth-century Poland, in Russia and later the Soviet Union

intemperate: Read  not temperate or moderate; excessive, especially in use of alcoholic beverages

intense: Read  extreme; acute; in an extreme degree

interact: Read  interplay; act together or towards others or with

interdependence: Read  interconnection; interrelation; dependence between two or more people, groups, or things

interfere: Read  disrupt; hinder; be or create a hindrance or obstacle

interior: Read  inside; inner part; internal; inner

interlocutor: Read  one who speaks in dialogue or takes part in conversation

interloper: Read  intruder; one that interferes with affairs of others, often for selfish reasons

interment: Read  act or ritual of interring or burying; act of burying dead body; burial

interminable: Read  being or seeming to be without an end; endless; tedious; continual

intermittent: Read  periodic; on and off; stopping and starting at intervals

internal: Read  inside; interior; located within the limits or surface

internecine: Read  mutually destructive; equally devastating to both sides

interpretation: Read  explanation; performer's distinctive personal version of a song, dance, piece of music

interregnum: Read  temporary halting of usual operations of government or control; time between two reigns

intervention: Read  interference; interfering in some course of events

intimate: Read  give to understand; imply as a possibility; make known subtly and indirectly

intoxication: Read  excitement beyond the bounds of sobriety; drunkenness; poisoning by a drug or toxic substance

intractable: Read  difficult to manage or govern; stubborn; unyielding

intransigence: Read  refusal of any compromise; stubbornness

intrepid: Read  fearless; indicating or springing from courage

intrinsic: Read  relating to essential nature of a thing; inherent; built-in

introspective: Read  looking within oneself; thoughtful about oneself; studying or exhibiting one's own internal state

intrusion: Read  inappropriate or unwelcome addition; infringement; violation; forcible inclusion or entry

inundate: Read  overwhelm; cover with water, especially floodwaters

inure: Read  apply in use; use or accustom till no pain or inconvenience; harden; habituate

inured: Read  accustomed; made tough by habitual exposure

invalidate: Read  make invalid; nullify; destroy

invective: Read  abusive language used to express blame or ill will

inverse: Read  opposite; reversed in order, nature, or effect; turned upside down

invert: Read  turn upside down or inside out; reverse the position, order, or condition of

invertebrate: Read  animal, such as an insect, that lacks backbone or spinal column

investigate: Read  explore; observe or inquire into in detail; examine systematically

investigation: Read  detailed inquiry or systematic examination; inquiry

inveterate: Read  deep-rooted; firmly and long established; habitual

invidious: Read  designed to create ill will or envy

invigorate: Read  give vigor to; give life and energy to; strengthen; animate

inviolable: Read  secure from corruption, attack, or violation; unassailable

invocation: Read  prayer for help; calling upon as reference or support

irascible: Read  irritable; easily angered; excited by or arising from anger

ire: Read  anger; wrath; keen resentment; irritate

iridescent: Read  exhibiting or giving out colors like those of rainbow; gleaming or shimmering with rainbow colors

irksome: Read  causing annoyance, weariness, or vexation; tedious

irony: Read  expression by deliberate contrast between apparent and intended meaning; witty language used to insult

irradiate: Read  expose to radiation; cast rays of light upon

irreconcilable: Read  incompatible; not able to be resolved

irrefutable: Read  unable to be disproved; incontrovertible; undeniable

irregularly: Read  erratically; unevenly; in an irregular manner; without rule, method, or order

irremediable: Read  incurable; uncorrectable; impossible to remedy or correct

irrepressible: Read  unable to be restrained; difficult or impossible to control or restrain

irreproachable: Read  perfect or blameless in every respect; faultless; impeccable

irresolute: Read  uncertain how to act or proceed; undecided; lacking in resolution

irretrievable: Read  impossible to recover or regain; irreparable

irreverence: Read  lack of proper respect; disrespectful act or remark

irreverent: Read  disrespectful; showing lack of due respect; not revering god

irreversible: Read  impossible to reverse or be reversed

irrevocable: Read  unalterable; irreversible; impossible to retract or revoke

irritable: Read  easily annoyed; abnormally sensitive to a stimulus

irritating: Read  exasperating; annoying; causing irritation; vexing; provoking

itinerant: Read  wandering; traveling place to place, especially to perform work or duty