How to say "Absorption" in Japanese

When translating "absorption" into Japanese, you must choose carefully between 熱中 and 没頭. In Japanese, 熱中 (ねっちゅう (necchuu)) is typically associated with "absorption; being engrossed in; enthusiasm" (Syllabus Level: N3) and represents Used to describe being deeply absorbed or engrossed in an activity, often to the point of forgetting everything else. Can be positive. On the other hand, 没頭 (ぼっとう (bottō)) maps to "absorption, engrossment, devotion" (Syllabus Level: N2) and represents Implies being completely immersed in an activity or task, to the point of forgetting everything else.. A literal translation of "absorption" can often sound unnatural to native Japanese speakers if mixed up!