impetus

• 推动事物前进的力量或动力；也指突然施加力量的动作，常用于描述推动的冲力或势头。

A noun referring to a force that moves something along or the act of applying force suddenly, often used to describe a driving impulse or momentum.

1. Driving forceB2formal

   A force that causes something to move forward or develop.

   推动力

   • The new policy provided the impetus for economic growth.
   • His speech gave fresh impetus to the reform movement.
   • The discovery of oil lent impetus to industrial development in the region.
   • A slight push was enough to start the ball rolling with the needed impetus.

   同义词boostcatalystdriveencouragementincentivemomentummotivationpushspurstimulus

   反义词deterrenthindranceobstacle

2. Sudden momentumC1formal

   The act of applying force suddenly to set something in motion.

   推动力

   • The player struck the ball with a sharp impetus to send it over the goalkeeper.
   • The initial impetus of the engine propelled the rocket into the sky.
   • He gave the door a sudden impetus and it slammed shut.
   • The collision transferred its impetus to the smaller car.

   同义词impulsejoltpushshovethrust