Source : Webster's Revised Unabridged Dictionary (1913)

Inexplicable \In*ex"pli*ca*ble\, a. [L. inexplicabilis: cf. F.
   inexplicable. See {In-} not, and {Explicable}.]
   Not explicable; not explainable; incapable of being
   explained, interpreted, or accounted for; as, an inexplicable
   mystery. ``An inexplicable scratching.'' --Cowper.

         Their reason is disturbed; their views become vast and
         perplexed, to others inexplicable, to themselves
         uncertain.                               --Burke.

Source : WordNet®

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}]