Where does “extero-” come from?

extero- (English) comes from Latin exter, from Proto-Italic *eksteros.

Ancestry of “extero-”, step by step

StepLanguageWordMeaning
1LatinexterOn the outside, outward, external, outer; Of...
2Proto-Italic*eksteros—

Words derived from “extero-”

Every word from Proto-Italic *eksteros →Every word from Latin exter →