1. undo的動詞過去分詞

a.[F]

1. 沒有做的，未完成的
   I left my work undone.

   工作未完成，我就放下了。

2. 毀了的；丟臉的
3. 煩亂的；擾亂的
4. 解開的；鬆開的
   His bow tie had come undone.

   他的領結鬆開了。

adj.

1. not tied or fastened.
2. not done or finished.
3. formal or humorous ruined by a disastrous setback.