I

Root Meaning in English Origin language Etymology (root origin) English examples i- go Greek (), () anion, anionic, cation, cationic, ion, ionic, ionize, polyanion, polycation iatr- heal Greek (), (), (), (), (), iatrogenic, physiatry, podiatrist, podiatry, psychiatrist, psychiatry ichthy- fish Greek () ichthyology, Ichthyophaga, ichthyophobia, ichthyoplankton, ichthyosis; (spelt icthy-) Icthyophaga icos- twenty Greek , (), "twenty times" hemi-icosahedron, icosagon, icosahedron icter- jaundice Greek (), (), icteric, icterogenic, icterohemorrhagic, icterohepatitis, icteroid, icterus id- shape, form, picture Greek (), () eidetic, eidolon, eidos, , idolater, idolatry, idyll, idyllic, idyllist, pareidolia ide- idea, thought Greek (), () ideogram, ideologue, ideology idi- own, peculiarity Greek , (), "private, personal, one's own" idiolect, idiom, idiopathic, idiopathy, idiophone, idiosyncrasy, idiosyncratic, idiot, idiotic ign- fire Latin igneous, ignite, ignition ignorare- not to know, to be unacquainted; mistake, misunderstand Latin ignore, ignorant, ignorance imagin- copy Latin , image, imagine imbr- heavy rain Latin , ignimbrite, imbrex, imbricate, imbrication, imbriferous in- sinew Greek (), () inion, inotrope, inotropic in- (1), il-, im- in, on Latin illuminate, import, incur, intend, invite in- (2), il-, im-, ir- not, un- (negation) Latin illicit, impossible, inimical, insane, irrational inan- empty, vain Latin "emptiness" and "worthlessness", from "to empty", from "empty, void, worthless" inane, inanition, inanity infra- below, under Latin infrared, infrastructure insul- island Latin insular, insulation integr- whole, complete Latin in-, teg- integrate, integration, integer, integrational, disintegrate, integral, unintegrated inter- among, between Latin (preposition) intercollegiate, intermission, intersection intra- inside, within Latin intramural, intravenous iota- I, i Greek iota iotacism irasc-, irat- be angry Latin "grow angry", from "anger" irascible, irate, ire irid- rainbow Latin iris iridescent is-, iso- equal, same Greek (), () isogloss, isograph, isometric, isomorphic, isosceles, isotonic, isotropic-itisinflammationGreek-ῖτιςappendicitis, diverticulitis, arthritis, tonsillitis, dermatitis, iritis, carditis, gastritis, colitis, cystitisischi-hip jointGreek (), ()ischiadic, ischium, sciatic, sciatica iter- again Latin , iteration itiner- journey Latin , itinerary References