per·mute /pɝˈmjut/
  (vt.)變更,交換,取代,置換,排列
  Per·mute v. t.
  1. To interchange; to transfer reciprocally.
  2. To exchange; to barter; to traffic. [Obs.]
     Bought, trucked, permuted, or given.   --Hakluyt.
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  permute
       v : change the order or arrangement of; "Dyslexics often
           transpose letters in a word" [syn: commute, transpose]