Home/JLPT N4/Vocabulary/熱心熱心N4🔊☆ Save to listねっしんMeaning—Kanji in this word熱心Example sentencesこの本は彼の熱心な研究の成果である。This book is a result of his enthusiastic research.Related words安心一安心一心一心に遠心力会心快い核心