anteroom
n.
also ante-room, 1762, literally "a room in front;" after French antichambre, Italian anticamera, from Latin ante "before" (see ante) + camera (see chamber).
〔李〕[ante-=in front of前；room n.室 ⇒“a room in front of the main room 在主居室之前的房间”→] n. small room leading to a large one；waiting room 前室；接待室