A bathroom or restroom, especially a public one in a building or establishment.
From 'wash' plus 'room,' a direct English compound. This term became especially common in North American English in the 20th century as a polite way to refer to bathrooms.
English speakers argue about what to call bathrooms—'washroom,' 'restroom,' 'toilet,' 'loo'—and it's one of the few daily things where regional vocabulary is incredibly strong and emotional!
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