IELTS writing relies on your vocabulary skill, especially in the academic writing test. Study shows that your vocabulary range and accuracy impact at least 25% writing band. So writing vocabulary is very important to prepare for the IELTS writing test.
Task 2 essay usually is around 300 words. If you want to have a good score, you cannot use generic or basic words thoroughly. Try to highlight your idea with 5-7 hard or low-frequency words, which are similar to the following 100 words, which will impress the examiners, like you own an edge vocabulary skill.
You may think it's too short. However, writing isn't like reading; in reading tests, you cannot choose words, but in writing tests, you can select words by yourself. So these 100 words can play a significant role in your writing. Of course, you can also prepare other high score words for Task 2 writing.
Word List
aberration: something that differs from the normabhor: fill with horror and loathing; horrify; hateacquiesce: assent; agree without protestingalacrity: cheerful promptness or willingness; eagerness; speed or quicknessamiable: good-natured and likable; lovable; warmly friendlyappease: bring peace, quiet, or calm to; satisfy or relievearcane: secret; mysterious; known only to the initiatedavarice: greediness for wealth; insatiable desire of gainbrazen: having loud, usually harsh, resonant sound; shamelessbrusque: abrupt and curt in manner or speech; rudely abrupt, unfriendlycajole: influence or urge by gentle urging or flatteringcallous: emotionally hardened; unfeelingcandor: frankness; quality of being honest and straightforward in attitude and speechchide: scold mildly so as to correct or improve; express disapprovalcircumspect: carefully aware of all circumstances; cautiousclandestine: secret; conducted with or marked by hidden aims or methodscoerce: restrain by force, especially by law or authority; repress; curbcoherent: adhesive; cohesive; sticking together ; logical; sound; capable of thinking and expressing yourself in a clear and consistent mannercomplacency: feeling of contented self-satisfaction, especially when unaware of upcoming troubleconfidant: a person entrusted with secretsconnive: to plot, schemecumulative: increasing by successive additiondebase: reduce in quality or value; lower in esteem; degradedecry: express strong disapproval of; disparagedeferential: showing deference; respectful and consideratedemure: modest and reserved in manner or behaviorderide: ridicule; make fun of; laugh at with contemptdespot: tyrant; harsh, authoritarian ruler; eastern Orthodox bishopdiligent: assiduous; industrious; hard-workingelated: overjoyed; extremely happy and excitedeloquent: vividly or movingly expressive; persuasiveembezzle: appropriate fraudulently to one's own use, as property entrusted to one's care; apply to one's private uses by a breach of trustempathy: understanding and entering into another's feelingsenmity: ill will; hatred; quality or state of being hostileerudite: learned; scholarly, with emphasis on knowledge gained from booksextol: praise highly; glorify; celebratefabricate: build; put together out of components or partsferal: not domestic; wild; existing in wild or untamed stateflabbergasted: astonished; appalled, amazed, or stunnedforsake: leave someone who needs or counts on youfractious: inclined to make trouble; disobedient; irritablefurtive: marked by quiet and caution and secrecygluttony: excess in eating; extravagant indulgence of the appetite for food; voracitygratuitous: given freely; unwarranted; granted without recompense; unearnedhaughty: high; lofty; bold; arrogant; overbearinghypocrisy: act or practice of a hypocriteimpeccable: faultless; incapable of sin or wrongdoingimpertinent: improperly forward or bold; rudeimplacable: incapable of being pacified; not to be relieved;impudent: casually rude, insolent, impertinentincisive: penetrating, clear, and sharp, as in operation or expressionindolent: lazy; slow to heal, grow, or develop; inactiveinept: lacking of judgment, sense, or reason; unsuited; inappropriate; foolishinfamy: notoriety, extreme ill reputeinhibit: restrain; prevent or forbid; hold backinnate: possessed at birth; inborninsatiable: not easily satisfied; impossible to satiate or satisfy; greedyinsular: of isolated people, especially having a narrow viewpointintrepid: fearless; indicating or springing from courageinveterate: deep-rooted; firmly and long established; habitualjubilant: happy; merry; joyful and proud especially because of triumph or successknell: the solemn sound of a bell, often indicating a deathlithe: flexible; moving and bending with easelurid: causing shock or horror; gruesomemaverick: one that refuses to abide or be independent; an unbranded range animalmaxim: proverb; formulation of fundamental principle or general truthmeticulous: excessively careful; marked by extreme care in treatment of detailsmodicum: limited quantity; small or moderate amount; any small thingmorose: ill humored; sullen; depressingly dark; gloomy; persistentmyriad: of very large or indefinite number; of ten thousandnadir: lowest point; point on sphere opposites zenith diametricallynominal: in name only; insignificantly smallnovice: beginner; person new to a field or activitynuance: subtle or slight degree of differenceoblivious: inattentive or unmindful; lacking all memory; forgetfulobsequious: slavishly attentive; attempting to win favor from influential people by flatteryobtuse: lacking in insight or discernment; stupidpanacea: remedy for all diseases, evils, or difficulties; a cure-allparody: work or performance that imitates another work or performance with ridicule or irony; make fun ofpenchant: strong inclination; definite likingperusal: a careful examination, reviewplethora: excess; overfullness in any respect; superabundancepredilection: condition of favoring or liking; tendency towards; preferencequaint: odd; old-fashioned; picturesque; unfamiliar or unusual in characterrash: hasty, incautiousrepudiate: disown; refuse to acknowledge; reject validity or authority ofrife: excessively abundant or numerous; in widespread existence, practice, or usesalient: prominent or protruding; projecting outwardly; moving by leaps or springsserendipity: gift for finding valuable or desirable things by accident; accidental good fortune or luckstaid: sober; serious, organized, and professional; characterized by dignity and proprietysuperfluous: being beyond what is required or sufficientsycophant: one who attempts to win favor by flattering influential people; bootlicker; yes mantaciturn: silent or reserved in speech; saying little; not inclined to speak or conversetefurbish: to restore, clean uptruculent: disposed to fight; belligerent; aggressively hostileumbrage: resentment, offencevenerable: deserving high respect; impressive by reason of age; profoundly honoredvex: annoy; disturb, especially by minor irritations; be a mystery or bewildering tovociferous: offensively loud; noisy; making outcrywanton: unrestrained; willfully malicious; immoral or unchastezenith: point directly overhead in sky; summit
Spelling Exercise

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(1) something that differs from the norm

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(2) fill with horror and loathing; horrify; hate

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(3) assent; agree without protesting

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(4) cheerful promptness or willingness; eagerness; speed or quickness

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(5) good-natured and likable; lovable; warmly friendly

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(6) bring peace, quiet, or calm to; satisfy or relieve

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(7) secret; mysterious; known only to the initiated

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(8) greediness for wealth; insatiable desire of gain

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(9) having loud, usually harsh, resonant sound; shameless

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(10) abrupt and curt in manner or speech; rudely abrupt, unfriendly

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(11) influence or urge by gentle urging or flattering

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(12) emotionally hardened; unfeeling

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(13) frankness; quality of being honest and straightforward in attitude and speech

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(14) scold mildly so as to correct or improve; express disapproval

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(15) carefully aware of all circumstances; cautious

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(16) secret; conducted with or marked by hidden aims or methods

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(17) restrain by force, especially by law or authority; repress; curb

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(18) adhesive; cohesive; sticking together ; logical; sound; capable of thinking and expressing yourself in a clear and consistent manner

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(19) feeling of contented self-satisfaction, especially when unaware of upcoming trouble

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(20) a person entrusted with secrets

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(21) to plot, scheme

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(22) increasing by successive addition

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(23) reduce in quality or value; lower in esteem; degrade

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(24) express strong disapproval of; disparage

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(25) showing deference; respectful and considerate

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(26) modest and reserved in manner or behavior

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(27) ridicule; make fun of; laugh at with contempt

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(28) tyrant; harsh, authoritarian ruler; eastern Orthodox bishop

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(29) assiduous; industrious; hard-working

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(30) overjoyed; extremely happy and excited

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(31) vividly or movingly expressive; persuasive

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(32) appropriate fraudulently to one's own use, as property entrusted to one's care; apply to one's private uses by a breach of trust

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(33) understanding and entering into another's feelings

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(34) ill will; hatred; quality or state of being hostile

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(35) learned; scholarly, with emphasis on knowledge gained from books

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(36) praise highly; glorify; celebrate

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(37) build; put together out of components or parts

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(38) not domestic; wild; existing in wild or untamed state

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(39) astonished; appalled, amazed, or stunned

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(40) leave someone who needs or counts on you

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(41) inclined to make trouble; disobedient; irritable

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(42) marked by quiet and caution and secrecy

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(43) excess in eating; extravagant indulgence of the appetite for food; voracity

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(44) given freely; unwarranted; granted without recompense; unearned

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(45) high; lofty; bold; arrogant; overbearing

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(46) act or practice of a hypocrite

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(47) faultless; incapable of sin or wrongdoing

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(48) improperly forward or bold; rude

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(49) incapable of being pacified; not to be relieved;

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(50) casually rude, insolent, impertinent

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(51) penetrating, clear, and sharp, as in operation or expression

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(52) lazy; slow to heal, grow, or develop; inactive

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(53) lacking of judgment, sense, or reason; unsuited; inappropriate; foolish

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(54) notoriety, extreme ill repute

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(55) restrain; prevent or forbid; hold back

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(56) possessed at birth; inborn

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(57) not easily satisfied; impossible to satiate or satisfy; greedy

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(58) of isolated people, especially having a narrow viewpoint

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(59) fearless; indicating or springing from courage

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(60) deep-rooted; firmly and long established; habitual

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(61) happy; merry; joyful and proud especially because of triumph or success

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(62) the solemn sound of a bell, often indicating a death

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(63) flexible; moving and bending with ease

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(64) causing shock or horror; gruesome

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(65) one that refuses to abide or be independent; an unbranded range animal

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(66) proverb; formulation of fundamental principle or general truth

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(67) excessively careful; marked by extreme care in treatment of details

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(68) limited quantity; small or moderate amount; any small thing

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(69) ill humored; sullen; depressingly dark; gloomy; persistent

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(70) of very large or indefinite number; of ten thousand

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(71) lowest point; point on sphere opposites zenith diametrically

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(72) in name only; insignificantly small

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(73) beginner; person new to a field or activity

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(74) subtle or slight degree of difference

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(75) inattentive or unmindful; lacking all memory; forgetful

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(76) slavishly attentive; attempting to win favor from influential people by flattery

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(77) lacking in insight or discernment; stupid

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(78) remedy for all diseases, evils, or difficulties; a cure-all

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(79) work or performance that imitates another work or performance with ridicule or irony; make fun of

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(80) strong inclination; definite liking

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(81) a careful examination, review

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(82) excess; overfullness in any respect; superabundance

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(83) condition of favoring or liking; tendency towards; preference

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(84) odd; old-fashioned; picturesque; unfamiliar or unusual in character

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(85) hasty, incautious

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(86) disown; refuse to acknowledge; reject validity or authority of

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(87) excessively abundant or numerous; in widespread existence, practice, or use

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(88) prominent or protruding; projecting outwardly; moving by leaps or springs

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(89) gift for finding valuable or desirable things by accident; accidental good fortune or luck

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(90) sober; serious, organized, and professional; characterized by dignity and propriety

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(91) being beyond what is required or sufficient

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(92) one who attempts to win favor by flattering influential people; bootlicker; yes man

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(93) silent or reserved in speech; saying little; not inclined to speak or converse

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(94) to restore, clean up

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(95) disposed to fight; belligerent; aggressively hostile

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(96) resentment, offence

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(97) deserving high respect; impressive by reason of age; profoundly honored

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(98) annoy; disturb, especially by minor irritations; be a mystery or bewildering to

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(99) offensively loud; noisy; making outcry

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(100) unrestrained; willfully malicious; immoral or unchaste

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(101) point directly overhead in sky; summit