fall back
verb.
fall backwards and down
verb.
hang (back) or fall (behind) in movement, progress, development, etc.
Synonym: dawdle, fall behind, lag
verb.
move back and away from
The enemy fell back
verb.
retreat
Synonym: recede, fall behind, drop off
verb.
have recourse to
The government resorted to rationing meat
Synonym: recur, resort
verb.
go back to bad behavior
Those who recidivate are often minor criminals
Synonym: lapse, recidivate, regress, relapse, retrogress
Antonym: gain