Where does “inner” come from?

inner (Middle English) comes from Old English innera, from Proto-Indo-European h₁én — in.

Ancestry of “inner”, step by step

StepLanguageWordMeaning
1Old Englishinnerainner, interior
2Proto-Indo-Europeanh₁énin

Words derived from “inner”

Every word from Proto-Indo-European h₁én →
inner — Etymology, Origin & Word History | Etymology Explorer