| A | B |
|---|
| iconoclast | one who attacks common beliefs or institutions |
| ignominious | humiliating, disgracing |
| impassive | stoic, not susceptible to suffering |
| imperious | commanding, domineering |
| impertinent | rude, insolent |
| impervious | impenetrable, incapable of being affected |
| impetuous | rash; hastily done |
| impinge | 1. to impact, affect, make an impression 2. to encroach, infringe |
| implacable | incapable of being appeased or mitigated |
| impudent | casually rude, insolent, impertinent |
| inchoate | unformed or formless, in a beginning stage |
| incontrovertible | indisputable |
| indefatigable | incapable of defeat, failure, decay |
| ineffable | unspeakable, incapable of being expressed through words |
| inexorable | incapable of being persuaded or placated |
| ingenuous | not devious; innocent and candid |
| inimical | hostile |
| iniquity | wickedness or sin |
| insidious | appealing but imperceptibly harmful, seductive |
| intransigent | refusing to compromise, often on an extreme opinion |
| inure | to cause someone or something to become accustomed to a situation |
| invective | an angry verbal attack |
| inveterate | stubbornly established by habit |
