Synonyms and related words :
Byzantine, arcane, baffling, bewildering, bothering, complex, complicated, confounding, confusing, convoluted, cryptic, discomposing, disconcerting, dismaying, distracting, disturbing, embarrassing, enigmatic, flabbergasting, impenetrable, incomprehensible, intricate, involved, knotty, labyrinthine, mysterious, mystifying, paradoxical, perturbing, problematic, puzzling, recondite, riddling, sphinxlike, stupefying, twisted, unfathomable, upsetting