Meaning : Fall backwards and down.
Meaning : Hang (back) or fall (behind) in movement, progress, development, etc..
Synonyms : dawdle, fall behind, lag
Meaning : Move back and away from.
Example :
The enemy fell back.
Meaning : Retreat.
Synonyms : drop off, fall behind, recede
Obtain advantages, such as points, etc..
The home team was gaining ground.Meaning : Go back to bad behavior.
Example :
Those who recidivate are often minor criminals.
Synonyms : lapse, recidivate, regress, relapse, retrogress