This meaning refers to returning something to its previous state by reversing an action.
Press this button to undo the change.
You cannot undo what has already happened.
This figurative meaning refers to ruining or eliminating achievements, improvements, or relationships.
One careless decision could undo years of progress.
The scandal undid much of the company's good work.
This literary meaning describes a weakness or event causing someone's failure or destruction.
His pride eventually undid him.
The secret threatened to undo the politician.
