けっしんにぶ 決心が鈍る Show inflections LinksSentence search for 決心が鈍るSentence search for けっしんがにぶるKanji details for 決, 心 and 鈍Edit in JMdict Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending1. to waver in one's resolution Discussions Log in to talk about this word.