motive [ˈməʊtɪv]

以下由轻松背单词网站提供

n.动机，目的；adv.发动的，运动的

a reason for doing something

The police could not find a motive for the murder. 警察不能找到谋杀的动机。
He had some motive in telling this fable. 他讲这寓言故事是有用意的。