esoteric, abstruse, byzantine, obscure, convoluted, labyrinthine, recondite, opaque, indecipherable, complicated, archaic, intricate, mundane, inscrutable, obtuse, boolean algebra, legalese, confusing, mumbo jumbo, undecipherable, wonky, legalistic, antiquated, unversed, unwieldy, cumbersome, anachronistic, incomprehensible, bewildering, boolean logic, laborious, prosaic, rudimentary, trivial, tedious, cabalistic, latinate, quantum physics, nettlesome, unpoetic, sophistic, pedantic, antediluvian, idiosyncratic, nebulous, murky, complex, longwinded, encyclopedic, bureaucratic, tricksy, pettifogging, impenetrable, alphabet soup, differential calculus, banal, procedural, mystifying, polysyllabic, delphic oracle, versed, uninitiated, sumptuary, lexicographical, muddled, contentless, rarefied, lawyerly, pernickety, highfalutin, baffling, secretive, irksome, simultaneous equations, comprehensible, screwy, unfamiliar, unschooled, extraneous, terminological, mot juste, verbose, knotty, weighty, gimcrack, fuzzy logic, celestial mechanics, wordy, ouija board, prolix, nonsensical, obfuscating, contentious, uninformative, hoary, perplexing, phrasal, musty, overdetermined, prepositional, nonliterary, sesquipedalian, annoyance, avail, disquiet, doubt, earnest, im, regard, respect, sig, uneasiness, unhappiness, wonder, abridgments, acquaintance, adept, advan, advanced, alarm, alien, understood, alchemical, jurisprudential, juristic, kabbalistic, nonscientific, technical, abstract, divinatory, occult, substantive, halachic, outdated, pertinent

esoteric