motive
🇺🇸
/ˈməʊtɪv/
🇬🇧
/ˈməʊtɪv/
the reason why someone does something
The police are trying to find the motive for the crime.
警方正在努力寻找犯罪的动机。
causing movement or action
The motive force of the engine drives the wheels.
发动机的动力驱动着车轮。