WordNet: esoteric

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

• also see private

• similar to abstruse, deep, recondite

• similar to arcane

• similar to cabalistic, cryptic, cryptical, kabbalistic, qabalistic, sibylline

• similar to mysterious, mystic, mystical, occult, orphic, secret

esoteric

• (englanti) exoteric (antonym)
• (suomi) esoteerinen (synonyymi)