undo
ETYM as. undoen. Related to Un-, and Do to perform.
(Irregular preterit, past participle: undid, undone).
1. To cancel or reverse an action or its effect.
2. To make undone; revert to the original condition or situation.
undiversified · undividable · undivided · undivided interest · undivorced · undo · undoable · undock · undocked