impetus
🇺🇸
/ˈɪmpɪtəs/
🇬🇧
/ˈɪmpɪtəs/
something that makes a process or activity happen faster
Her speech gave impetus to the new project.
她的演讲为新项目提供了动力。
the force or energy that makes something move
The hill gave impetus to the rolling ball.
山坡给滚动的球提供了动力。