intractability
  難駕馭,棘手
  in·trac·ta·bil·i·ty /(ˌ)ɪnˌtræktəˈbɪlətɪ/ 名詞
  難處理性
  In·tract·a·bil·i·ty n. The quality of being intractable; intractableness.
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  intractability
       n : the trait of being hard to influence or control [syn: intractableness]
           [ant: tractability]