back up
Pronunciation:
verb
Definitions
To move backwards, especially for a vehicle to do so.
Example: That beeping sound indicates that the truck is backing up.
To move a vehicle backwards.
Example: Back up the car a little, you're blocking the driveway.
To undo one's actions.
Example: I couldn't see how to finish the project, so I backed up and tried it another way.
To reconsider one's thoughts.
Example: This isn't working. Let's back up and think about it.