Synonyms of mysterious

1 Syllable

greek, weird, dark, queer

2 Syllables

curious, queerer, baffling, delphic, queerest, occult, strange, mental, profound, covert, orphic, eerier, puzzling, secret, theurgic, tranced, delphian, spooky, runic, gothic, hidden, veiled, unknown, weirder, weirdest, cryptic, spookier, witching, mystic

3 Syllables

spiritual, mystifying, perplexing, mystical, arcane, theurgical, unproven, obscure, fairy-tale, symbolic, furtive, difficult, psychical, demoniac, sorcerous, telestic, witchlike, wizardly, unbeknownst, magical, sphinxlike, fathomless, obscurer, uncanny, abstruse, romantic, profoundest

4 Syllables

cloak-and-dagger, questionable, unknowable, inscrutable, ungraspable, transcendental, subliminal, oracular, subjective, unconfirmed, paranormal, unnatural, alchemistic, telepathic, insoluble, deviative, necromantic, nonrational, thaumaturgic, esoteric, unhonored, talismanic, supernormal, supranormal, cabalistic, fairytale, secretive, enigmatic, ensorcelled, equivocal, recondite

5 Syllables

unfathomable, incognizable, undefinable, controvertible, thaumaturgical, ideological, preternatural, astrological, unidentified, enigmatical, inexplicable, unexplainable, impenetrable, inexplainable, spiritualistic, telekinetic

6 Syllables

uncomprehensible, uninformative, incomprehensible

7 Syllables

parapsychological