The story
- Proto-Indo-European*per-der.?
- Proto-Indo-European*pér
- Proto-Indo-European*pró
- Ancient Greekπρό (pró)
- Ancient Greekπρῶτος (prôtos)
- Ancient Greekπρωτο- (prōto-)
- Englishproto-
- Englishfeather
- English todayprotofeather
Etymology from Wiktionary, CC BY-SA 4.0.