spare/ spεər /

1.adjective
(free) 多余的

2.adjective
(extra) 备用的

3.noun
see spare part

4.vt.[c] 
to spare sb the trouble/pain/details 避免某人的麻烦/痛苦/让某人知道详情

5.vt.
(make available) 抽出

6.vt.
(afford to give) 出让

7.vt.
(not harm) 幸免

these two are going spare
这两个是闲着的
to have time/money to spare
有剩余的时间/金钱
to spare no expense
不惜工本
I can spare (you) 5 minutes
我能(为你)抽出5分钟