undo

verb

1. 1

   remove the outer cover or wrapping of

   Let's unwrap the gifts!

   undo the parcel

2. 2

   cause to become loose

   undo the shoelace

   untie the knot

3. 3

   cancel, annul, or reverse an action or its effect

   I wish I could undo my actions

4. 4

   deprive of certain characteristics

5. 5

   cause the ruin or downfall of

   A single mistake undid the President and he had to resign