Emily Dickinson Lexicon

UN-DO', v.t. [pret. undid; pp. 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 can not undo crimes, errors or faults. To-morrow ere the setting sun, / She'd alt undo what she had done. Swift.
2. To loose; to open; to take to pieces; to unravel; to unfasten; to untie; as, to undo a knot. Waller.
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.