Cryptic
adjective
having a secret or hidden meaning; ; ; - John Gunther
“cabalistic symbols engraved in stone”
Similar: cabalistic, kabbalistic, qabalistic, cryptical, sibylline
adjective
of an obscure nature; ; ; ; - Rachel Carson
“the new insurance policy is written without cryptic or mysterious terms”
Similar: cryptical, deep, inscrutable, mysterious, mystifying
adjective
having a puzzling terseness
“a cryptic note”