noun
one's own room
Refers to a person's private room, often in a shared living situation like a dormitory, hotel, or family home. Slightly formal; in casual speech 自分の部屋 is more common.
彼は自室にこもって勉強している。
He is shut up in his room studying.
ホテルでは自室でゆっくり過ごした。
At the hotel, I relaxed in my own room.