UNDO

v. 1 loosen, loose, open, unfasten, unhook, unlace, unzip, unsnap, unbutton, untie, unpin; unlock, unbolt Help me undo my blouse Don't undo the gate - you'll let the dogs out. 2 unwrap, uncover, open, untie, unbind Why have you allowed the children to undo their Christmas presents a week early? 3 cancel, annul, rescind, nullify, void, declare null and void, reverse, invalidate: If one could undo things there would be no such thing as regret