Shirabe
難問

難問なんもん

Common Noun Irregular
Español jmdict
1
noun (common) (futsuumeishi)noun or participle which takes the aux. verb suru perplejidad;pregunta difícil;problema difícil
English jmdict
1
noun (common) (futsuumeishi)noun or participle which takes the aux. verb suru perplexity;difficult question;difficult problem
彼は難問を解決した。
He solved the difficult problem.