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American Dictionary of the English Language

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Undo


UNDO, verb transitive preterit tense undid; participle passive undone.

1. To reverse what has been done; to annul; to bring to naught any transaction. We can undo many kinds of work; but we cannot undo crimes, errors or faults.

Tomorrow ere the setting sun, she'd all undo what she had done.

2. To loose; to open; to take to pieces; to unravel; to unfasten; to untie; as, to undo a knot.

3. To ruin; to bring to poverty; to impoverish. Many are undone by unavoidable losses; but more undo themselves by vices and dissipation, or by indolence.

4. To ruin, in a moral sense; to bring to everlasting destruction and misery.

5. To ruin in reputation.