Usage patterns
〈場所〉に部屋を借りるto rent a room/apartment in a place
I decided to rent an apartment in Tokyo.
部屋を持つto own/run a sumo stable
The former yokozuna started his own sumo stable.
部屋を片付けるto tidy up a room
I plan to tidy up my room this weekend.
部屋にこもるto shut oneself up in one's room
He stayed shut up in his room all day.
部屋を探すto look for an apartment/room
I'm looking for an apartment because I'm moving.
部屋に入るto enter a room
I knocked before entering the room.
Expressions
下の部屋lower room; room for political officials (Edo period) 部屋を散らかすmess up a room; leave a room in a mess; scatter things around a room