Undo

·vt To reverse, as what has been done; to Annul; to bring to naught.

II. Undo ·vt To bring to poverty; to Impoverish; to ruin, as in reputation, morals, hopes, or the like; as, many are undone by unavoidable losses, but more undo themselves by vices and dissipation, or by indolence.

III. Undo ·vt To Loose; to Open; to take to piece; to Unfasten; to Untie; hence, to unravel; to Solve; as, to undo a knot; to undo a puzzling question; to undo a riddle.