Synonyms of 'abstruse'

arcane, arduous, blind, brutal, civilized, close, clouded, complex, complicated, covered, covert, critical, cultivated, cultured, deep, delicate, demanding, difficile, difficult, educated, encyclopedic, erudite, esoteric, exacting, formidable, hairy, hard, heavy, herculean, hermetic, hid, hidden, hypothetical, ideal, incommunicado, intricate, knotted, knotty, laborious, latent, Learned, lettered, literate, mean, mysterious, obscure, occult, operose, pansophic, polyhistoric, polymath, profound, recondite, rigorous, rough, rugged, scholastic, secluded, secret, sequestered, severe, spiny, steep, strenuous, studious, thorny, ticklish, toilsome, tough, transcendental, tricky, underground, unknown, uphill, wicked, wise