toilet; restroom; lavatory; bathroom
「御手洗」 has another reading with different meanings.
font of purifying water placed at the entrance of a shrine
御手洗はどこですか。
Where is the restroom?
御手洗を借りてもいい?
May I use the restroom?
この階には御手洗が二つあるそうだ。
I hear there are two restrooms on this floor.