retrogress
1. [ verb ] get worse; fall back to a previous or worse condition
Synonyms: retrograde regress
Related terms: progress worsen fall_back regression
2. [ verb ] go back to bad behavior
Synonyms: lapse regress recidivate fall_back relapse
Examples:

"Those who recidivate are often minor criminals"

Related terms: revert backsliding recidivism
Similar spelling:   retrogressive
  retrogression
  retrograde
  redress
  retrousse
  re-address
  retrospect