The story
- Proto-Indo-European*upó
- Proto-Italic*supo
- Latinsub
- Latinsub-
- Englishsub-
- Englishdura materellip.
- Englishdura
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Englishdural
- English todaysubdural
Etymology from Wiktionary, CC BY-SA 4.0.