なんもん

[難問] problem

【C】(困難な)問題， 疑問∥ A difficult problem faces him. 彼は難問に直面している / wrestle with a difficult problem 難問と取り組む

*puzzle

【C】［通例 a/the ～］ 解決できない事柄∥ Thought helped me solve the puzzle. 推理のおかげでその難問が解けた

crux

【C】《正式》［通例 the ～］ 難問， 難点；急所， ポイント， 核心

poser

【C】《略式》難題.

▲pose her a difficult question 彼女に難問を突きつける / The separation of gold from sand is problematic. 砂から金をより分けるのは難問だ / Several of the questions were difficult. なかには難問もいくつかあった.

南門
south gate
難問
perplexity
difficult question
difficult problem

* * *

なんもん【難問】

problem

〖C〗(困難な)問題， 疑問

A difficult problem faces him. 彼は難問に直面している

wrestle with a difficult problem 難問と取り組む

*puzzle

〖C〗［通例 a/the ～］ 解決できない事柄

Thought helped me solve the puzzle. 推理のおかげでその難問が解けた

crux

〖C〗《正式》［通例 the ～］ 難問， 難点；急所， ポイント， 核心

poser

〖C〗《略式》難題.

▲pose her a difficult question 彼女に難問を突きつける

The separation of gold from sand is problematic. 砂から金をより分けるのは難問だ

Several of the questions were difficult. なかには難問もいくつかあった.

* * *

なんもん【難問】

a difficult [tough, thorny, puzzling, baffling] problem [question]; a sticky issue; a conundrum; a hard nut to crack; a puzzle; a challenge.

●わが国の教育界には難問が山積している. Japan's educational community is fraught with numerous challenges.

●難問に取り組む grapple with a difficult question; tackle [attack] a hard problem

・難問に挑む[挑戦する] set oneself the challenge of solving a difficult problem

・難問に答える answer a hard problem; find the solution to a conundrum

・難問に逢着する encounter a thorny problem; come across a puzzle; be beset with perplexing difficulties

・思わぬ難問にぶつかる run up against unexpected challenges.

●彼の発言はこの難問の解決に新しい光明を与えた. His speech cast a new light on this thorny problem.

●(試験に)難問を出す pose a difficult problem (in the exam)

・難問を提出する put a hard question to [before] sb

・今度の事件で日本はアメリカに難問を突きつけた形になった. In this incident, Japan found itself aiming difficult questions at the United States.

・難問を抱える[抱えている] have difficult problems on one's hands; face [have to deal with] difficult problems [challenges]

・難問を解く solve [work out] a hard problem

・最大の難問を解決する settle the stickiest issue.