Byzantine, Daedalian, abstruse, arduous, balled up, beyond one, complex, compound, confounded, confused, convoluted, crabbed, cramp, daedal, devious, difficult, elaborate, embrangled, entangled, fancy, fouled up, garbled, gordian, hard, hard to understand, implicated, intricate, involuted, involved, jumbled, knotted, knotty, labyrinthian, labyrinthine, loused up, many-faceted, matted, mazy, meandering, messed up, mixed up, mucked up, multifarious, obfuscated, obscure, obscured, ornate, overtechnical, perplexed, ramified, recondite, roundabout, scrambled, screwed up, snarled, sophisticated, subtle, tangled, tangly, tough, twisted