IPA: //ˈbeɪðər//
KK: /ˈbeɪðər/
A person who takes a bath or swims in water, often for relaxation or enjoyment.
The bather enjoyed the warm sun while floating in the pool.
Bather → It is formed from "bath" (from Old English *baþ*, meaning a washing or immersion in water) and "-er" (meaning a person who). A bather is a person who bathes or washes in water.
Think of someone who is 'immersed' in water ('bath') — that's why a bather is a person who bathes.