名詞 undoing:

1. an act that makes a previous act of no effect (as if not done)
2. loosening the ties that fasten something
   同義詞：untying, unfastening

動詞 undo:

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

1. That proved to be my undoing, for I soon got back to my old bad habit of dozing off in front of the screen.
   這證明了我的失敗，因為我不久就回到電視屏幕前打瞌睡的壞習慣去了。
2. Greed was his undoing.
   貪婪就是墜落
3. Stress can be the undoing of so many fine players.
   緊張可能是這許多優(yōu)秀選手失敗的原因。