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.
He is indifferent to his studies.
You won't improve with a half-hearted attitude.
Formed by prefixing 不 (not) to 熱心 (enthusiasm, zeal). The reading ふねっしん follows standard on'yomi patterns.