How to say "Eager" in Japanese

When translating "eager" into Japanese, you must choose carefully between 熱心 and 懸命な. In Japanese, 熱心 (ねっしん (nesshin)) is typically associated with "eager, enthusiastic, keen" (Syllabus Level: N4) and represents Describes someone's attitude towards a task, study, or hobby, indicating strong interest and dedication. Can be used adverbially with 「に」. On the other hand, 懸命な (けんめいな (kenmeina)) maps to "eager, earnest, desperate, with all one's might" (Syllabus Level: N2) and represents Describes making a strenuous effort or doing something with utmost diligence, often in a difficult situation. Usually used adverbially with 〜に. A literal translation of "eager" can often sound unnatural to native Japanese speakers if mixed up!