hateful object (noun) pet peeve: personal hate
Sinonime: bewilderment, brain-twister,
charade, closed book,
complexity,
complication,
confusion, conundrum, cryptogram,
dilemma,
distraction,
doubt,
embarrassment, enigma, entanglement, intricacy, knotty question,
labyrinth,
maze, mind-boggler, mystery, mystification, perplexity,
plight, poser,
predicament, problem, puzzle, puzzlement,
quandary, question, rebus, sixty-four dollar question, stickler, strait, stumper, teaser, tough nut to crack, tough proposition, twister