difficult / hard, probably impossible

untie; unravel; undo (a fastening); unwrap / dispel (doubts); clear up (a matter)

solve (a problem); answer (a question); unravel (a riddle) / comb; untangle (hair)

(Internet slang) game over, with no success possible

past tense and perfective aspect of 詰む (tsumu) [godan]

(of textile) to be densely woven / (shogi, chess) to be checkmated / (rare) to be blocked / to be done for; to get a game over

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

set of problems

problem; point at issue

text that makes up a question/problem