The story
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*dwi-
- Proto-Italic*dwi-
- Latinbi-
- Englishbi-
- Proto-Indo-European*wekʷ-
- Proto-Indo-European*wṓkʷs
- Proto-Italic*wōks
- Latinvōx
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Latinvōcālis
- Middle Englishvocal
- Englishvocal
- English todaybivocal
Etymology from Wiktionary, CC BY-SA 4.0.