The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Germanic*un-
- Proto-West Germanic*un-
- Old Englishun-
- Middle Englishun-
- Englishun-
- Proto-Indo-European*welh₁-
- Proto-Germanic*welazder.?
- Proto-Germanic*welat?
- Proto-Germanic*wela
- Old Englishwel
- Middle Englishwel, wal, wol, wele
- Englishwell
- English todayunwell
Etymology from Wiktionary, CC BY-SA 4.0.