ねっしん 熱心 Common word JLPT N3 Wanikani level 13 Play audio LinksSentence search for 熱心Sentence search for ねっしんKanji details for 熱 and 心Edit in JMdict Na-adjective (keiyodoshi), Noun1. zealous; enthusiastic; ardent; fervent; keen; eager Discussions Log in to talk about this word.