1. An act that makes a previous act of no effect (as if not done)
   "The court's decision was the undoing of years of legislative work"; "His careless remark proved to be his undoing in the negotiation"
    
2. Loosening the ties that fasten something
   "The undoing of his shoelaces took longer than expected";
   - untying, unfastening

1. Remove the outer cover or wrapping of
   "undo the parcel";
   - unwrap
    
2. Cause to become loose
   "undo the shoelace";
   - untie
    
3. Cancel, annul, or reverse an action or its effect
   "I wish I could undo my actions"
    
4. Deprive of certain characteristics
   "God himself cannot unmake the past or undo what is done";
   - unmake
    
5. Cause the ruin or downfall of
   "A single mistake undid the President and he had to resign"

Derived forms: undoings

Type of: about-face, alter, change, expose, laxation, loosening, modify, policy change, reversal, reverse, ruin, turn, uncover, volte-face

Antonym: make, wrap

Encyclopedia: Undoing