| A | B |
|---|
| iconoclast | one who breaks with tradition |
| ignoble | not noble; dishonorable |
| ignominy | shame; dishonor; disgrace |
| ignominious | shameful; humiliating |
| imbibe | to drink (literally) or to absorb |
| imbue | to become saturated with, literally or figuratively; to inspire |
| imminent | about to occur |
| immutable | unchanging |
| impale | to pierce with something pointed |
| impasse | a dead end; a place that is impossible to get past |
| impassive | revealing no emotion |
| impeccable | flawless; faultless |
| impending | about to take place; imminent |
| imperious | domineering; bossy; dictatorial |
| impropriety | an improper action |
| impugn | to attack as false |
| impunity | safety from punishment |
| impute | to attribute to another; to name a cause or source |
| incessant | non-stop |
| incite | to stir up; to arouse |
| incognito | in disguise |
| incommodious | lacking space; not commodious |
| incontrovertible | indisputable; unquestionable |
| incubus | something that is burdensome; a nightmare |
| indolence | laziness |
| indomitable | unconquerable; impossible to dominate |
| inept | incompetent; also, awkward or clumsy |
| ingenious | original and imaginative |
| ingenuous | showing childlike simplicity; sincere |
| insatiable | impossible to satisfy |
| inscrutable | difficult to understand; mysterious |
| insensate | unconscious or otherwise lacking in sensation |
| insidious | working or spreading stealthily; sneaking inside to do something bad |
| insipid | lacking excitement; uninterested |
| intangible | not perceptible to the touch; impalpable |
