難なん問もん

Usage patterns

• 〈難なん問もん〉を解とくto solve a difficult problem

  彼かれはその難なん問もんを見み事ごとに解といた。

  He brilliantly solved the difficult problem.

• 〈難なん問もん〉に挑ちょうむto tackle a difficult problem

  科か学がく者しゃたちはその難なん問もんに挑ちょうんでいる。

  The scientists are tackling that difficult problem.

• 〈難なん問もん〉を抱かかえるto be faced with a difficult problem

  国くにはいくつもの難なん問もんを抱かかえている。

  The country is facing several difficult problems.

• 〈難なん問もん〉に取とり組くむto work on a difficult problem

  彼かの女じょは長なが年ねんこの難なん問もんに取とり組くんできた。

  She has been working on this difficult problem for many years.