Meanings1hard; diligently; zealouslyWith all one's heart.Written Forms열심히Hangul熱心히HanjaExamples from Lessons (3)그들은 열심히 노래하고 활동해요.They sing and work hard.Read the Lesson네, 저는 열심히 공부를 해요.Yes, I study hard.Read the Lesson오늘 하루도 열심히 하겠습니다.I will work hard today as well.Read the LessonGrammar in These Examples하다To do, to make-겠-Will, (I) intend to-고And, and then-ㅂ/습니다Formal polite ending