The story
- Proto-Indo-European*h₂éd
- Proto-Germanic*at
- Old Englishæt
- Middle Englishat
- Englishat
- Proto-Indo-European*wed-
- Proto-Indo-European*wódr̥
- Proto-Germanic*watōr
- Proto-West Germanic*watar
- Old Englishwæter
- Middle Englishwater
- Englishwater
- English todayAtwater
From at + water, a toponymic surname for someone who lived by a river or lake.
Etymology from Wiktionary, CC BY-SA 4.0.