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Vocabulary Study Online By Level (VSOBL) is a Fast, Reliable, and Handy tool to prepare English exam vocabulary. (Available for all VIP accounts: US$2/Month). It has built-in word lists: 6000 IELTS words, 6000 TOEFL words, 5000 GRE words, and 3000 SAT words. You can load them by level with one click.
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inured
Detail    speak
accustomed; made tough by habitual exposure
E.g.She became inured to the Alaskan cold.
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invalid
Detail    speak
of no force or weight; not valid; weak; void; null
E.g.This ticket has passed its expiration date, and so it is now invalid.
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invalidate
Detail    speak
make invalid; nullify; destroy
E.g.The relatives who received little or nothing sought to invalidate the will by claiming that the deceased had not been in his right mind when he had signed the document.
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invective
Detail    speak
abusive language used to express blame or ill will
E.g.He had expected criticism but not the invective that greeted his proposal.
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inverse
Detail    speak
opposite; reversed in order, nature, or effect; turned upside down
E.g.There is an inverse ratio between the strength of light and its distance.
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invert
Detail    speak
turn upside down or inside out; reverse the position, order, or condition of
E.g.When he tried to invert his body in a handstand, he felt the blood rush to his head.
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inveterate
Detail    speak
deep-rooted; firmly and long established; habitual
E.g.An inveterate smoker, Bob cannot seem to break the habit, no matter how hard he tries.
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invidious
Detail    speak
designed to create ill will or envy
E.g.We disregarded her invidious remarks because we realized how jealous she was.
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invincible
Detail    speak
incapable of being overcome or defeated; unconquerable
E.g.The president who once seemed invincible is now seen as potential vulnerable.
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inviolable
Detail    speak
secure from corruption, attack, or violation; unassailable
E.g.Batman considered his oath to keep the people of Gotham City inviolable: nothing on earth could make him break this promise.
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invocation
Detail    speak
prayer for help; calling upon as reference or support
E.g.The service of Morning Prayer opens with an invocation during which we ask God to hear our prayers.
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invulnerable
Detail    speak
incapable of injury; impossible to damage, injure, or wound
E.g.In a country where a quarter of students say guns are easily accessible at home, expecting any measure to make a school invulnerable is unrealistic.
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iota
Detail    speak
very small amount; a bit; ninth letter of the Greek alphabet
E.g.All this does not take away one iota from the terrible acts committed yesterday.
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irascible
Detail    speak
irritable; easily angered; excited by or arising from anger
E.g.Miss Minchin's irascible temper intimidated the younger schoolgirls, who feared she'd burst into a rage at any moment.
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irate
Detail    speak
feeling or showing extreme anger; enraged
E.g.One idea that has left many parents and other residents irate is a plan to cut at least 22 teachers by changing class schedules.
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iridescent
Detail    speak
exhibiting or giving out colors like those of rainbow; gleaming or shimmering with rainbow colors
E.g.She admired the iridescent hues of the oil that floated on the surface of the water.
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irksome
Detail    speak
causing annoyance, weariness, or vexation; tedious
E.g.He found working on the assembly line irksome because of the monotony of the operation he had to perform.
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ironic
Detail    speak
humorously sarcastic or mocking
E.g.What's truly ironic is how both sides in this polarized debate use precisely the same tactics.
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irony
Detail    speak
expression by deliberate contrast between apparent and intended meaning; witty language used to insult
E.g.That most of us miss the irony is a vivid demonstration of our blindness.
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irreconcilable
Detail    speak
incompatible; not able to be resolved
E.g.Because the separated couple were irreconcilable, the marriage counselor recommended a divorce.
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