1. 扔毛巾(认输,放弃)：the whole nine yards 整整九码(一举成功,美式足球的攻方一次需推进十码) | throw in the towel 扔毛巾(认输,放弃) | tie the knot 打结(结婚)

2. 拱手认负：use a sledge hammer to crack a nut 杀鸡用牛刀(高射炮打蚊子 | throw in the towel 拱手认负; | bury the hatchet 握手言和;

3. 认输,放弃：the walls have ears 隔墙有耳 | throw in the towel 认输,放弃 | tie the knot 结婚

4. 认输：throw in one's hand 放弃 | throw in the towel 认输 | throw into the shade 逊色

verb

1. give up in the face of defeat of lacking hope
admit defeat

e.g. In the second round, the challenger gave up

Synonym: drop outgive upfall by the waysidedrop by the waysidethrow inquitchuck up the sponge