undid

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

1. Your buttons areall undone.
   你的钮扣全解开了。
2. He undid most of the good work of his predecessor.
   他把前任的大部分业绩毁掉了。
3. He bent down and undid his shoelaces.
   他俯下身来解开鞋带。