regress
Concise Oxford English Dictionary © 2008 Oxford University Press:
regress
▶verb /rɪˈgrɛs/
- 1 return to a former state.
■ return mentally to a former stage of life or a supposed previous life.
- 2 Statistics calculate the regression of.
- 1 the action of regressing.
- 2 Philosophy a series of statements in which a logical procedure is continually reapplied to its own result without approaching a useful conclusion.
– origin ME: from L. regressus, from regredi ‘go back, return’.
'regress' also found in these Oxford entries:

