rented room
Refers to a room that one rents, typically in a shared house or apartment. Not a common word in modern Japanese; 賃貸の部屋 or 借りている部屋 are more usual.
He is looking for a rented room in Tokyo.
Compound of 借り (kari, 'borrowing') + 間 (ma, 'room'). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning.