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1. Not done
   "the work could be done or undone and nobody cared"
    
2. Doomed to extinction
   - done for, ruined, sunk, washed-up
    
3. Not fastened or tied or secured
   "her blouse had come undone at the neck"; "his shoelaces were undone"
    
4. Thrown into a state of disorganization or incoherence
   - unstuck

1. Cancel, annul, or reverse an action or its effect
   "I wish I could undo my actions"
    
2. Deprive of certain characteristics
   - unmake
    
3. Cause the ruin or downfall of
   "A single mistake undid the President and he had to resign"
    
4. Cause to become loose
   "undo the shoelace"
   - untie, loosen
    
5. Remove the outer cover or wrapping of
   "undo the parcel"
   - unwrap

See also: disorganised [Brit], disorganized, undoer, undoing, unfastened, unfinished, unsuccessful

Type of: alter, change, change by reversal, expose, modify, reverse, ruin, turn, uncover

Encyclopedia: Undo