動(dòng)詞 undo:

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

1. The knot was fastened in such a way that it was impossible to undo.
   這個(gè)結(jié)系得那麼緊，根本解不開。
2. He undid most of the good work of his predecessor.
   他把前任的大部分業(yè)績毀掉了。
3. That mistake has undone all our good work.
   那個(gè)過錯(cuò)使我們前功盡棄。
4. It's better for the doer to undo what he has done.
   解鈴還需系鈴人。
5. Our folly has undone us.
   我們的愚蠢行為將自己毀了。