難なん事じ件けんなんじけんFreq.FrequencyTop 50,000Meanings1noundifficult case; hard caseRefers to a case that is hard to solve or handle, often used for crimes, legal matters, or complex problems.この殺さつ人じん事じ件けんは警けい察さつにとって難なん事じ件けんだ。This murder case is a difficult one for the police.
