Meaning of REGRESS in English
■ verb rɪ'grɛs
1》 return to a former state.
↘return mentally to a former stage of life or a supposed previous life.
2》 Statistics calculate the ~ion of.
■ noun 'ri:grɛs
1》 the action of ~ing.
2》 Philosophy a series of statements in which a logical procedure is continually reapplied to its own result without approaching a useful conclusion.
ME: from L. ~us , from regredi 'go back, return'.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004