Where does “вне́шне-” come from?

вне́шне- (Russian) comes from Russian вне́шний, from Russian вне, from Old East Slavic вънѣ.

Ancestry of “вне́шне-”, step by step

StepLanguageWordMeaning
1Russianвне́шнийouter, exterior, outside, external
2Russianвнеout of, outside
3Old East Slavicвънѣ—
Every word from Old East Slavic вънѣ →Every word from Russian вне →Every word from Russian вне́шний →