(nonstandard) simple past tense and past participle of undo

plural of undoing

To reverse the effects of an action. / To unfasten. / (figuratively) To impoverish or ruin, as in reputation; to cause the downfall of.

(computing) An operation that reverses a previous action.

Misspelling of undue.

The act of loosening or unfastening / Ruin; defeat, (also) that which causes defeat or ruin. / Annulment; reversal

present participle of undo

Third-person singular simple present indicative form of undo

plural of undo