1. Cancel, annul, or reverse an action or its effect (synset 201522610)
    "I wish I could undo my actions"
  2. Deprive of certain characteristics (synset 201622250)
  3. Cause the ruin or downfall of (synset 202565025)
    "A single mistake undid the President and he had to resign"
  4. Cause to become loose (synset 201287511)
    "undo the shoelace"; "untie the knot"; "loosen the necktie"
  5. Remove the outer cover or wrapping of (synset 201286874)
    "Let's unwrap the gifts!"; "undo the parcel"

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