perplexing, baffling, mystifying, surprising, troubling, disconcerting, startling, bizarre, inexplicable, curious, unsettling, strange, intriguing, worrisome, maddening, disquieting, bewildering, peculiar, galling, shocking, unsurprising, disturbing, exasperating, vexing, incomprehensible, dismaying, interesting, ironic, noteworthy, disheartening, infuriating, odder, alarming, paradoxical, unusual, counterintuitive, distressing, unnerving, fascinating, confusing, irksome, frustrating, problematic, unexplainable, befuddled, dispiriting, instructive, perturbing, jarring, discomforting, cryptic, mysterious, unfathomable, obvious, astonishing, plausible, dumbfounding, tantalizing, flummoxed, frightening, explicable, explainable, troublesome, debatable, lamentable, muddled, embarrassing, saddening, enigmatic, implausible, unexplained, notable, understandable, coincidental, boggling, illogical, contradictory, fortuitous, amusing, comical, heartening, atypical, bothersome, convoluted, weird, depressing, inscrutable, astounding, obtuse, incredulous, apparent, laughable, remarkable, uncharacteristic, nonplussed, peeved, glaring, disenchanting, unanswerable, complicated, bemused, preposterous, unimportant, problematical, singular, trivial, inconsequential, striking, aggravating, analogous

circuitous, complicatedness, complication, cryptic, knottiness

confusing, enigmatic, enigmatical, incomprehensible, perplexing, unclear, uncomprehensible