Where does “īn-” come from?

īn- (Middle High German) comes from Old High German in, from Proto-West Germanic *in, from Proto-Germanic in, from Proto-Indo-European én — in.

Ancestry of “īn-”, step by step

StepLanguageWordMeaning
1Old High Germaninin
2Proto-West Germanic*in
3Proto-Germanicinin; into
4Proto-Indo-Europeanénin

Words derived from “īn-

Every word from Proto-Indo-European énEvery word from Proto-Germanic inEvery word from Proto-West Germanic *in