Synonyms of esoteric

Adjective

1. esoteric (vs. exoteric), abstruse, deep, recondite, arcane, cabalistic, kabbalistic, qabalistic, cryptic, cryptical, sibylline, mysterious, mystic, mystical, occult, secret, orphic, private

usage: confined to and understandable by only an enlightened inner circle; "a compilation of esoteric philosophical theories"

Definition and meaning of esoteric (Dictionary)