The story
- Proto-Indo-European*per-der.?
- Proto-Indo-European*pér
- Proto-Indo-European*pró
- Ancient Greekπρό (pró)
- Englishpro-
- Proto-Indo-European*weys-
- Proto-Indo-European*wisós
- Proto-Italic*weizos
- Latinvīrus
- Middle Englishvirus
- Englishvirus
- English todayprovirus
Etymology from Wiktionary, CC BY-SA 4.0.