na-adjective, noun
indifference; lack of enthusiasm; inattentiveness
Describes a person, attitude, or effort that is not enthusiastic or committed. Often used in contexts like study, work, or participation.
彼は勉強に不熱心だ。
He is indifferent to his studies.
不熱心な態度では上達しない。
You won't improve with a half-hearted attitude.
無関心 emphasizes a lack of interest or concern, while 不熱心 focuses on a lack of active enthusiasm or effort.
Formed by prefixing 不 (not) to 熱心 (enthusiasm, zeal). The reading ふねっしん follows standard on'yomi patterns.