Old English undon "to unfasten and open" (a window or door), "to unfasten by releasing from a fixed position; to cancel, discharge, abrogate, reverse what has been done, put back in a former condition; bring to ruin, destroy," from un- (2) "opposite of" + do (v.). Related: Undone; undoing.
实用例句
1. If Michael won, he would undo everything I have fought for.
如果迈克尔赢了，那我一直以来努力争取的一切都将白费。
来自柯林斯例句
2. Once the damage is done, even modern surgery can't undo it entirely.
伤害一旦造成，即使是现代外科手术也无法将其完全消除。
来自柯林斯例句
3. A heavy-handed approach from the police could undo that good impression.