backslide cock degenerate deteriorate disimprove fall fall again into fall astern fall back fall behind fall from grace get behind get worse go backwards go behind grow worse have a relapse jerk back lapse lapse back let down lose ground pull back recede recidivate recur to regress relapse retrocede retroflex retrograde retrogress retrovert return return to reverse revert revert to sicken sink back slacken slide back worsen yield again to