dec·o·rous /ˈdɛkɚ/
  (a.)有禮貌的,高雅的,端正的
  Dec·or·ous a.  Suitable to a character, or to the time, place, and occasion; marked with decorum; becoming; proper; seemly; befitting; as, a decorous speech; decorous behavior; a decorous dress for a judge.
     A decorous pretext the war.   --Motley.
  -- De*co*rous*ly, adv. -- De*co*rous*ness, n.
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  decorous
       adj 1: characterized by propriety and dignity and good taste in
              manners and conduct; "the tete-a-tete was decorous in
              the extreme" [ant: indecorous]
       2: according with custom or propriety; "her becoming modesty";
          "comely behavior"; "it is not comme il faut for a
          gentleman to be constantly asking for money"; "a decent
          burial"; "seemly behavior" [syn: becoming, comely, comme
          il faut, decent, seemly]