cryptic, cryptical, deep, inscrutable, mysterious, mystifying -- (of an obscure nature; "the new insurance policy is written without cryptic or mysterious terms"; "a deep dark secret"; "the inscrutable workings of Providence"; "in its mysterious past it encompasses all the dim origins of life"- Rachel Carson; "rituals totally mystifying to visitors from other lands")
cabalistic, kabbalistic, qabalistic, cryptic, cryptical, sibylline -- (having a secret or hidden meaning; "cabalistic symbols engraved in stone"; "cryptic writings"; "thoroughly sibylline in most of his pronouncements"- John Gunther)
cryptic -- (having a puzzling terseness; "a cryptic note")
(Sound)
