noun
one room; a single room
Refers to a single room, often in contexts like hotels, apartments, or buildings. Can also imply a private room or a room within a larger space.
このアパートは一室だけ空いています。
Only one room is available in this apartment.
ホテルの一室で会議が行われた。
The meeting was held in a hotel room.
Also means 'one room,' but 一部屋 is more colloquial and often used in counting rooms (e.g., 一部屋借りる). 一室 is slightly more formal and common in written or business contexts.
Compound of 一 (one) and 室 (room). The reading いっしつ follows regular sound changes from いち + しつ.