The story
- Proto-Indo-European*upó
- Proto-Italic*supo
- Latinsub
- Latinsub-
- Englishsub-
- Proto-Indo-European*wekʷ-
- Proto-Indo-European*wṓkʷs
- Proto-Italic*wōks
- Latinvōx
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Latinvōcālis
- Middle Englishvocal
- Englishvocal
- Englishvocalize
- Englishvocalization
- English todaysubvocalization
From sub- + vocalization.
Etymology from Wiktionary, CC BY-SA 4.0.