do you的缩写

undo [ʌn'duː],vt. 取消；解开；破坏；扰乱;vi. 撤消

例句：He undid his belt because it was too tight.他解开了他的腰带，因为它太紧了。

What is done cannot be undone.覆水难收。

Our folly has undone us.我们的愚蠢把我们毁了。