| verb | cancel, annul, or reverse an action or its effect “I wish I could undo my actions” |
| verb | deprive of certain characteristics |
| verb | cause the ruin or downfall of “A single mistake undid the President and he had to resign” |
| verb | cause to become loose “undo the shoelace” |
| verb | remove the outer cover or wrapping of “Let's unwrap the gifts!” |
| undoing | noun | an act that makes a previous act of no effect (as if not done) |
| undoer | noun | a person who destroys or ruins or lays waste to |
| untier | noun | a person who unfastens or unwraps or opens |
| untying | noun | loosening the ties that fasten something |
| loosening | noun | the act of making something less tight |