| Term | Definition |
| idolatry | the worship of idols, excessive admiration of |
| iconoclast | someone who tries to destroy traditional ideas or institutions |
| hypocrisy | insincerity by virtue of pretending to have qualities or beliefs that you do not really have |
| hyperbole | a figure of speech that uses exaggeration to express strong emotion, make a point, or evoke humor |
| homogeneous | of same kind |
| heterogeneous | of different kind, diverse in character |
| heterodox | characterized by departure from accepted beliefs or standards |
| harangue | a long, passionate speech |
| callow | lacking experience of life, immature, youthful, inexperienced |
| gullible | easily tricked because of being too trusting |
| induce | succeed in persuading or influencing, bring about or give rise to |
| indolence | inactivity resulting from a dislike of work |
| indoctrinate | to teach, or brainwash |
| imbue | to permeate or influence as if by dyeing; to tinge or dye deeply; to provide with something freely or naturally |
| indigent | poor enough to need help from others |
| indigence | a state of extreme poverty or destitution |
| indeterminate | not leading to a definite ending or result |
| incursion | an attack that penetrates into enemy territory |
| inculpate | to charge with fault, blame |
| incorporate | unite or merge with something already in existence, formed or united into a whole |
| eulogy | expression of praise |
| euphemism | an inoffensive expression that is substituted for one that is considered offensive |
| exacerbate | make worse |
| euphony | any agreeable (pleasing and harmonious) sounds, sweet sound |
| exculpate | pronounce not guilty of criminal charges |
| execrable | extremely bad; abomitable; detestable; of very poor quality |
| exigent | requiring immediate aid or action; also, demanding. |
| expound | add details, as to an account or idea |
| extrapolation | an inference about the future (or about some hypothetical situation) based on known facts and observations |
| exult | to express great joy |
| insensible | unresponsive to stimulation, unconscious, unresponsive, unaffected |
| insensate | without compunction or human feeling, devoid of feeling and consciousness and animation |
| innocuous | unlikely to harm or disturb anyone |
| inimical | unfriendly, hostile, harmful, detrimental |
| inherent | existing as an essential constituent or characteristic, firmly established by nature or habit; intrinsic |
| ingenuous | Candid, frank, or open in character or quality. |
| infusion | a solution obtained by steeping or soaking a substance (usually in water), the act of infusing or introducing a certain modifying element or quality |
| inert | slow and apathetic, unable to move or resist motion |
| ineffable | defying expression or description |
| produce | cultivate by growing, often involving improvements by means of agricultural techniques |
| inured | made tough by habitual exposure, accustomed |
| inundate | (v) to flood, overflow; to overwhelm by numbers or size SYN: submerge, deluge, swamp, fill or cover completely, usually with water |
| intransigent | not capable of being swayed or diverted from a course |
| intractable | not tractable, not easily managed or controlled; unruly |
| interloper | someone who intrudes on the privacy or property of another without permission |
| insular | narrowly restricted in outlook or scope |
| insolent | arrogent, insulting, insulting in manner or speech; rude |
| insipid | lacking interest or significance, lacking in flavor; dull |
| insinuate | give to understand, imply |
| insidious | intended to entrap, sly,crafty,tricky |