regress - noun

the reasoning involved when you assume the conclusion is true and reason backward to the evidence

returning to a former state

regress - verb

• go back to a statistical means
• go back to a previous state
• get worse or fall back to a previous condition
• go back to bad behavior

regress - thesaurus

lapse   recidivate   regression   relapse   retrograde   retrogress   retrogression   retroversion   retrovert   return   reversion   revert