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.