abstract thought, logical thinking, reasoning - thinking that is coherent and logical

reversal - a change from one state to the opposite state; "there was a reversal of autonomic function"

change - undergo a change; become different in essence; losing one's or its original nature; "She changed completely as she grew older"; "The weather changed last night"

recidivate, relapse, retrogress, regress, lapse, fall back - go back to bad behavior; "Those who recidivate are often minor criminals"

change by reversal, reverse, turn - change to the contrary; "The trend was reversed"; "the tides turned against him"; "public opinion turned when it was revealed that the president had an affair with a White House intern"

resile - return to the original position or state after being stretched or compressed; "The rubber tubes resile"

recuperate, recover, go back - regain a former condition after a financial loss; "We expect the stocks to recover to $2.90"; "The company managed to recuperate"

decline, worsen - grow worse; "Conditions in the slum worsened"

fall behind, drop off, recede, fall back, lose - retreat

retrovert, revert, turn back, regress, return - go back to a previous state; "We reverted to the old rules"