Where does “extern” come from?

extern (Dutch) comes from French externe, from Latin externus, from Latin exter, from Proto-Italic *eksteros.

extern (Dutch): external; exterior

Definitions

  1. external; exterior

Ancestry of “extern”, step by step

StepLanguageWordMeaning
1Frenchexterneexternal
2Latinexternusoutward, external; foreign, alien, strange
3LatinexterOn the outside, outward, external, outer; Of...
4Proto-Italic*eksteros—
Every word from Proto-Italic *eksteros →Every word from Latin exter →Every word from Latin externus →