I

iconoclastic - adj. destructive of images used in religious worship; said of religions, such as Islam, in which the representation of living things is prohibited; characterized by attack on established beliefs or institutions
imbue - verb suffuse with color; fill, soak, or imbue totally; spread or diffuse through
immaculate - adj. completely neat and clean; free from stain or blemish; without fault or error
immolate - verb offer as a sacrifice by killing or by giving up to destruction
immure - verb lock up or confine, in or as in a jail
impasse - noun a street with only one way in or out; a situation in which no progress can be made or no advancement is possible
imperceptible - adj. impossible or difficult to perceive by the mind or senses
imprecation - noun the act of calling down a curse that invokes evil (and usually serves as an insult); a slanderous accusation
inchoate - adj. only partly in existence; imperfectly formed
in medias res - into the middle of things
incubus - noun a male demon believed to lie on sleeping persons and to have sexual intercourse with sleeping women; someone who depresses or worries others; a situation resembling a terrifying dream
ineluctable - adj. impossible to avoid or evade:"inescapable conclusion"
infrastructure - noun the stock of basic facilities and capital equipment needed for the functioning of a country or area; the basic structure or features of a system or organization
inhibit - verb limit the range or extent of; to put down by force or authority
insouciant - adj. marked by blithe unconcern
internecine - adj. characterized by bloodshed and carnage for both sides; (of conflict) within a group or organization
inveigle - verb influence or urge by gentle urging, caressing, or flattering