The story
- Proto-Indo-European*men-
- Proto-Indo-European*mn̥-tó-s
- Proto-Germanic*munþaz
- Proto-West Germanic*munþ
- Old Englishmūþ
- Middle Englishmouth
- Englishmouth
- Proto-Indo-European*wed-
- Proto-Indo-European*wódr̥
- Proto-Germanic*watōr
- Proto-West Germanic*watar
- Old Englishwæter
- Middle Englishwater
- Englishwatering
- English todaymouthwatering
Etymology from Wiktionary, CC BY-SA 4.0.