be·nign /bɪˈnaɪn/
 (a.)良性的
 be·nign /bɪˈnaɪn/ 形容詞
 良性
 Be·nign a.
 1. Of a kind or gentle disposition; gracious; generous; favorable; benignant.
    Creator bounteous and benign.   --Milton.
 2. Exhibiting or manifesting kindness, gentleness, favor, etc.; mild; kindly; salutary; wholesome.
    Kind influences and benign aspects.   --South.
 3. Of a mild type or character; as, a benign disease.
 Syn: -- Kind; propitious; bland; genial; salubrious; favorable salutary; gracious; liberal.
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 benign
      adj 1: not dangerous to health; not recurrent or progressive
             (especially of a tumor) [ant: malignant]
      2: pleasant and beneficial in nature or influence; "a benign
         smile"; "the benign sky"; "the benign influence of pure
         air" [syn: benignant] [ant: malign]
      3: of disposition or manner; "the benign ruler of millions";
         "benign intentions"