'washroom' originates from the English words 'wash' and 'room', where 'wash' meant 'to clean' and 'room' referred to a space or area.

'washroom' evolved from the combination of 'wash' and 'room' in English, maintaining its meaning as a space for washing and sanitation.

Initially, it meant 'a room for washing', and this meaning has largely remained the same in modern usage.