unoccupied

I searched the entire train but couldn't find a single unoccupied seat.

(Chinese) 我搜寻了整列火车，却没找到一个空座。

The hotel remains largely unoccupied during the winter off-season.

(Chinese) 在冬天的淡季，这家酒店的大部分房间都是空着的。

If you are unoccupied this afternoon, perhaps you could help me paint the fence.

(Chinese) 如果你今天下午有空，也许可以帮我粉刷栅栏。

Retirement left him with too much unoccupied time, so he took up gardening.

(Chinese) 退休后他闲暇时间太多，于是开始从事园艺。