English
handwasher
From hand + washer.
Proto-Indo-European *wed- ‘wet, water’
…
Proto-West Germanic *waskan ‘to wash’
Old English wascan ‘to wash’
Middle English wasshen ‘to wash’
Middle English wasshere ‘one who debases coins by using acid to wear…’
English washer
Today it means
noun A person who washes his or her hands.
Language periods are conventional ranges, not dates for this word.
Etymograph / handwasher