mysterious

Of, relating to, or being a religious mystery.

Arousing wonder or curiosity, especially by being difficult to explain or understand.

Partaking of or containing mystery; obscure; not revealed or explained; unintelligible.

Expressing, intimating, or implying a mystery.

Of or pertaining to mystery; containing a mystery; difficult or impossible to understand; inexplicable; obscure; not revealed or explained; enigmatical; incomprehensible.