IPA: /ˈwɒʃhaʊs/
KK: /ˈwɔːshhaʊs/
A small building or room where clothes are washed, often equipped with laundry facilities.
She spent the afternoon in the washhouse, cleaning her family's clothes.
Washhouse → It is formed from "wash" (from Old English *wæscan*, meaning to cleanse or wash) and "house" (from Old English *hus*, meaning a dwelling or shelter). A washhouse is a place designated for washing, typically referring to a building or area where laundry is done.
Think of a place where you 'cleanse' ('wash') your clothes in a 'shelter' ('house') — that's what a washhouse is.