dead-end vs undo

dead-end

• To come to a dead-end. 

• A road with no exit. 

• A position that offers no hope of progress. 

• Going nowhere; blocked. 

undo

• To unfasten. 

• To reverse the effects of an action. 

• To impoverish or ruin, as in reputation; to cause the downfall of. 

• An operation that reverses a previous action.