Synonyms of 'arcane'

abstruse, cabalistic, classified, close, closed, cryptic, dark, deep, eerie, enigmatic, esoteric, extramundane, extraterrestrial, fey, hermetic, hidden, hush-hush, hyperphysical, impenetrable, inscrutable, latent, mysterious, mystic, mystical, numinous, occult, otherworldly, preterhuman, preternatural, profound, psychic, recondite, restricted, secret, spiritual, superhuman, supernatural, supernormal, superphysical, supersensible, supersensual, supranatural, transcendental, transmundane, unaccountable, uncanny, undisclosed, undivulged, unearthly, unknowable, unrevealed, unspoken, untold, unutterable, unuttered, unworldly, weird