undo
verb- undo something
to open something that is fastened, tied or wrapped 打开；解开；拆开 to undo a button/knot/zip 解开钮扣/结/拉链 to undo a jacket/shirt 解开夹克/衬衫 I undid the package and took out the books. 我打开包裹取出书来。
- undo something
to cancel the effect of something 消除，取消，废止（某事的影响） He undid most of the good work of the previous manager. 他把前任经理的大部分功绩都毁掉了。 It's not too late to try and undo some of the damage. 想办法补救部分损失还为时不晚。 UNDO (= a command on a computer that cancels the previous action) 撤销（计算机的还原指令） Just select ‘Edit’ and ‘Undo’ to cancel the previous action. 只要选择“编辑”和“复原”便可撤销前一个动作。
- [usually passive] undo somebody/something (formal)
to make somebody/something fail 打败；挫败
Word OriginOld English undōn (see un-, do1).