undone

动词 undo:

1. cancel, annul, or reverse an action or its effect
   同义词：undo
2. deprive of certain characteristics
   同义词：unmake, undo
3. cause the ruin or downfall of
   同义词：undo
4. cause to become loose
   同义词：untie, undo, loosen
5. remove the outer cover or wrapping of
   同义词：unwrap, undo

形容词 undone:

1. not done
2. doomed to extinction
   同义词：done for, ruined, sunk, washed-up
3. not fastened or tied or secured
4. thrown into a state of disorganization or incoherence
   同义词：unstuck

1. What is done cannot be undone.
   已做的事是既成事实。
2. What's done cannot be undone.
   覆水难收。
3. That mistake has undone all our good work.
   那个过错使我们前功尽弃。
4. Our folly has undone us.
   我们的愚蠢行为将自己毁了。
5. He was gone and left all the work undone to me.
   他走了，把所有没做完的工作都留给了我。
6. One of your buttons is undone.
   你的一个扣子松开了。