in·ex·pli·ca·ble /ˌɪnɪkˈsplɪkəbəl, (ˌ)ɪˈnɛk(ˌ)splɪ-/
  (a.)不能說明的,不能解釋的,費解的
  In·ex·pli·ca·ble a.  Not explicable; not explainable; incapable of being explained, interpreted, or accounted for; as, an inexplicable mystery. “An inexplicable scratching.”
     Their reason is disturbed; their views become vast and perplexed, to others inexplicable, to themselves uncertain.   --Burke.
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  inexplicable
       adj : incapable of being explained or accounted for; "inexplicable
             errors"; "left the house at three in the morning for
             inexplicable reasons" [syn: incomprehensible] [ant: explicable]