regress in WordNet English dictionary

1. go back to bad behavior
   "Those who recidivate are often minor criminals"
   relapse  lapse  recidivate  regress  retrogress  fall back 
   
2. get worse or fall back to a previous condition
   regress  retrograde  retrogress 
   
3. go back to a previous state
   "We reverted to the old rules"
   revert  return  retrovert  regress  turn back 
   
4. go back to a statistical means
   regress 
   

1. the reasoning involved when you assume the conclusion is true and reason backward to the evidence
   regress  reasoning backward 
   
2. returning to a former state
   regression  regress  reversion  retrogression  retroversion