recondite, esoteric, deep, mystifying, complicated, over one's head, gross, involute, hard, brain-bending, more...

clear, concise, explicit, transparent

esoteric, arcane, obscure, more...

most, least, such, french, certain, deep, religious, profound, smoky, difficult, priori

hard to comprehend,   difficult to grasp,   over subtle,   few understand it,   overly technical,   hard to take in,   difficult to parse,   too technical,   complex hermetic,   deep obscure