Where does “i-” come from?

i- (Italian) comes from Italian in-, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

Ancestry of “i-”, step by step

StepLanguageWordMeaning
1Italianin-un-; in-; a-
2Latinīn-un-, non-, not
3Latinînin, at, on, upon, from (space)
4Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
5Proto-Italicenin
6Proto-Indo-Europeanh₁énin

Words derived from “i-”

Every word from Proto-Indo-European h₁én →Every word from Latin īn- →Every word from Proto-Italic en →