List of Greek and Latin roots in English/I
# List of Greek and Latin roots in English/I

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* X
* Z

## I

| Root | Meaning in English | Origin language | Etymology (root origin) | English examples |
| - | - | - | - | - |
| i- | go | Greek | ἰέναι (iénai), ἴμμεναι, ἰόν, ἰών (ímmenai, ión, iṓn) | anion, anionic, cation, cationic, ion, ionic, ionize, polyanion, polycation |
| iatr- | heal | Greek | ἰᾶσθαι (iâsthai), ἰατρός (iatrós), ἰατρικός (iatrikós), ἰατρεύειν (iatreúein), ἰατρεία (iatreía), ἴασις, ἴαμα | iatrogenic, physiatry, podiatrist, podiatry, psychiatrist, psychiatry |
| ichthy- | fish | Greek | ἰχθύς, ἰχθύος (ikhthús, ikhthúos) | ichthyology, Ichthyophaga, ichthyophobia, ichthyoplankton, ichthyosis |
| icos- | twenty | Greek | ϝεικοσι, εἴκοσι (eíkosi), εἰκοσάς, εἰκοσάκις "twenty times" | hemi-icosahedron, icosagon, icosahedron |
| icter- | jaundice | Greek | ἴκτερος (íkteros), ἰκτερικός (ikterikós), ἰκτεριάω | icteric, icterogenic, icterohemorrhagic, icterohepatitis, icteroid, icterus |
| id- (ϜΙΔ) | shape, form, picture | Greek | εἶδειν (eîdein), εἶδος (eîdos) | eidetic, eidolon, eidos, idol, idolater, idolatry, idyll, idyllic, idyllist, pareidolia |
| ide- | idea, thought | Greek | ἰδεῖν (ideîn), ἰδέα (idéa) | ideogram, ideologue, ideology |
| idi- | own, peculiarity | Greek | ϝίδιος, ἴδιος (ídios), "private, personal, one's own" | idiolect, idiom, idiopathic, idiopathy, idiophone, idiosyncrasy, idiosyncratic, idiot, idiotic |
| ign- | fire | Latin | ignis | igneous, ignite, ignition |
| ignorare- | "not to know, to be unacquainted; mistake, misunderstand | Latin | ignotus | ignore, ignorant, ignorance, ignoramous |
| imagin- | copy | Latin | imāgō, imāginis | image, imagine |
| imbr- | heavy rain | Latin | imber, imbris | ignimbrite, imbrex, imbricate, imbrication, imbriferous |
| in- | sinew | Greek | ἴς, ἰνός (ís, inós), ἰνίον (iníon) | inion, inotrope, inotropic |
| in- (1), il-, im- | in, on | Latin | in | illuminate, import, incur, intend, invite |
| in- (2), il-, im-, ir- | not, un- (negation) | Latin | in- | illicit, impossible, inimical, insane, irrational |
| inan- | empty, vain | Latin | inanitio "emptiness" and inanitas "worthlessness", from inanire "to empty", from inanis "empty, void, worthless" | inane, inanition, inanity |
| infra- | below, under | Latin | infra | infrared, infrastructure |
| insul- | island | Latin | insula | insular, insulation |
| integr- | whole, complete | Latin | in-, teg- | integrate, integration, integer, integrational, disintegrate, integral, unintegrated |
| inter- | among, between | Latin | inter (preposition) | intercollegiate, intermission, intersection |
| intra- | inside , within | Latin | intra | intramural, intravenous |
| iota- | I, i | Greek | iota | iotacism |
| irasc-, irat- | be angry | Latin | irasci "grow angry", from ira "anger" | irascible, irate, ire |
| irid- | rainbow | Latin | iris | iridescent |
| is-, iso- | equal, same | Greek | ϝίσϝος (wíswos), ἴσος (ísos) | isogloss, isograph, isometric, isomorphic, isosceles, isotonic, isotropic |
| -itis | inflammation | Greek | -ῖτις | tonsillitis |
| ischi- | hip joint | Greek | ἰσχίον (iskhíon), ἰσχιαδικός (iskhiadikós) | ischiadic, ischium, sciatic, sciatica |
| iter- | again | Latin | iterum, iterare | iteration |
| itiner- | journey | Latin | iter, itineris | itinerary |
