re·gress /ˈriˌgrɛs/
  復原;逆行;複歸權
  re·gress /rɪˈgrɛs/ 不及物動詞
  退化,退行
  Re·gress n.
  1. The act of passing back; passage back; return; retrogression. “The progress or regress of man”.
  2. The power or liberty of passing back.
  Re·gress v. i. [imp. & p. p. Regressed p. pr. & vb. n. Regressing.] To go back; to return to a former place or state.
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  regress
       n 1: the reasoning involved when you assume the conclusion is
            true and reason backward to the evidence [syn: reasoning
            backward]
       2: returning to a former state [syn: regression, reversion,
           retrogression, retroversion]
       v 1: go back to a statistical means
       2: go back to a previous state; "We reverted to the old rules"
          [syn: revert, return, retrovert, turn back]
       3: get worse; fall back to a previous or worse condition [syn:
          retrograde, retrogress] [ant: progress]
       4: go back to bad behavior; "Those who recidivate are often
          minor criminals" [syn: relapse, lapse, recidivate, retrogress,
           fall back]