re·con·dite /ˈrɛkənˌdaɪt, rɪˈkɑn-/
 (a.)深奧的,難解的,隱藏的
 Rec·on·dite a.
 1. Hidden from the mental or intellectual view; secret; abstruse; as, recondite causes of things.
 2. Dealing in things abstruse; profound; searching; as, recondite studies. “Recondite learning.”
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 recondite
      adj : difficult to penetrate; incomprehensible to one of ordinary
            understanding or knowledge; "the professor's lectures
            were so abstruse that students tended to avoid them";
            "a deep metaphysical theory"; "some recondite problem
            in historiography" [syn: abstruse, deep]