01 a. Of or pertaining to mystery; containing a mystery; difficult or impossible to understand; inexplicable; obscure; not revealed or explained;…
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1.
Of or pertaining to mystery; containing a mystery; difficult or impossible to understand; inexplicable; obscure; not revealed or explained; enigmatical; incomprehensible.“God at last To Satan, first in sin, his doom applied, Thought in mysterious terms.” — Milton.
Syn.
Obscure; secret; occult; dark; mystic; cabalistic; enigmatical; unintelligible; inexplicable; incomprehensible.