Where does “extraterrestre” come from?

extraterrestre (Italian) comes from Italian extra-, from Latin extrā, from Latin exter, from Proto-Italic *eksteros.

extraterrestre (Italian): extraterrestrial; extraterrestrial, alien

Definitions

  1. extraterrestrial; extraterrestrial, alien

Ancestry of “extraterrestre”, step by step

StepLanguageWordMeaning
1Italianextra-extra
2Latinextrāon the outside
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 extrā →