in·scru·ta·ble /ɪnˈskrutəbəl/
  (a.)難以瞭解的,不能預測的
  In·scru·ta·ble a.  Unsearchable; incapable of being searched into and understood by inquiry or study; impossible or difficult to be explained or accounted for satisfactorily; obscure; incomprehensible; as, an inscrutable design or event.
  'T is not in man
  To yield a reason for the will of Heaven
  Which is inscrutable.   --Beau. & Fl.
     Waiving a question so inscrutable as this.   --De Quincey.
  ◄ ►
  inscrutable
       adj : of an obscure nature; "the new insurance policy is written
             without cryptic or mysterious terms"; "a deep dark
             secret"; "the inscrutible workings of Providence"; "in
             its mysterious past it encompasses all the dim origins
             of life"- Rachel Carson; "rituals totally mystifying to
             visitors from other lands" [syn: cryptic, cryptical,
              deep, mysterious, mystifying]