The company remains reluctant to invest in untested technologies.

reluctant 是形容词，意思是"不情愿的、勉强的"，由前缀 re-（表示"反对"）和词根 luct（来自拉丁语 luctari，意为"挣扎"）组成，字面意思是"内心挣扎的"，引申为"不愿意的"。