Dictionary and Thesaurus

Definition of Undo

• (v. t.) To reverse, as what has been done; to annul; to bring to naught.
• (v. t.) 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.
• (v. t.) 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.

Synonyms of Undo

• Unmake
• Untie
• Loosen
• Unwrap

Antonyms of Undo

• Make
• Wrap

Homophones of Undo

• Undue