noun
A polite, feminine term for a chamber pot or bedpan, used especially in traditional or historical contexts.
昔の旅館では、部屋にお厠が置いてあった。
In old inns, a chamber pot was placed in the room.
The prefix お- (honorific) is attached to 厠 (かわ), an old word for toilet or privy. The exact historical derivation of かわ is uncertain.