'bathroom' originates from the English words 'bath' and 'room', where 'bath' meant 'a washing or soaking in water' and 'room' meant 'a space that can be occupied'.

'bathroom' evolved from the combination of 'bath' and 'room' in the English language, maintaining its meaning as a space for bathing.

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