whacks

She whacked him in the mouth.

她猛地一拳打在他的嘴上。

You can use Carol's old bike - the gears are out of whack, but it still goes.

你可以骑卡罗尔的旧自行车——齿轮可能有点问题，但还能骑。

That's not a fair whack.

这一份太少了。

He gave the ball a whack with his stick.

他用球棒猛击了一下球。