Open English Wordnet
Verbs
(v)undocancel, annul, or reverse an action or its effect“I wish I could undo my actions” (v)undocause the ruin or downfall of“A single mistake undid the President and he had to resign” (v)untie, undo, loosencause to become loose“undo the shoelace”,
“untie the knot”,
“loosen the necktie” (v)unwrap, undoremove the outer cover or wrapping of“Let's unwrap the gifts!”,
“undo the parcel”