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"
