undo

/ʌnˈduː/

noun

  1. 1

    An operation that reverses a previous action.

    How many undos does this program support?

verb

  1. 1

    To reverse the effects of an action.

    Fortunately, we can undo most of the damage to the system by the war.
  2. 2

    To unfasten.

    Could you undo my buckle for me?
  3. 3

    To impoverish or ruin, as in reputation; to cause the downfall of.

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