undo

undo
(undoes; past undid; past participle undone)
[with obj.]
  1. unfasten, untie, or loosen (something)
    解开;打开
    the knot was difficult to undo.
    这个结很难解。
  2. cancel or reverse the effects or results of (a previous action or measure)
    消除…影响或结果;使恢复原状
    there wasn't any way Evelyn could undo the damage.
    伊芙琳根本无法消除那损害所造成的影响。
    ■cancel (the last command executed by a computer)
    取消(计算机上一个执行的命令);恢复
  3. (formal)cause the downfall or ruin of
    (正式)使垮台;毁灭
    Iago's hatred of women undoes him.
    埃戈对女性的仇恨毁了他自己。
noun
  1. (Computing)a feature of a computer program that allows a user to cancel or reverse the last command executed
    (计算机)撤消还原
语源
  1. Old English undōn (see un-, do)
英语宝典
考试词汇表