impetus
🇺🇸
/ˈɪmpɪtəs/
🇬🇧
/ˈɪmpɪtəs/
something that makes a process or activity happen faster
Her speech gave impetus to the new project.
彼女のスピーチが新プロジェクトに勢いを与えた。
the force or energy that makes something move
The hill gave impetus to the rolling ball.
丘が転がるボールに勢いを与えた。