The story
- Proto-Indo-European*men-
- Proto-Hellenic*mónwos
- Ancient Greekμόνος (mónos)
- Ancient Greekμονο- (mono-)
- Englishmono-
- 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 todaymonovocal
Etymology from Wiktionary, CC BY-SA 4.0.