Word열심히yeolsimhiMeaninghardPart of speechadverbPronunciationCourseHardcore KoreanLessonLesson 27Usages of yeolsimhi요즘 친구랑 도서관에서 열심히 공부해요.yojeum chingurang doseogwaneseo yeolsimhi gongbuhaeyo.These days I study hard at the library with a friend.