He reluctantly accepted the job offer.

reluctantly 是副词，来自形容词 reluctant（不情愿的）。reluctant 由前缀 re-（表示"反对"）和词根 luct（源自拉丁语 luctari，意为"挣扎"）组成，字面意思是"反对挣扎"，引申为"不情愿的"。reluctantly 表示"不情愿地、勉强地"。