rev [rev]

以下由轻松背单词网站提供

vi.发动机旋转，加快速度；vt.使加速；增加

a revolution (= one complete turn of a part in an engine )

It's his job to rev up the audience before the show starts. 他要负责在表演开始前鼓动观众的热情。
Don't rev the engine so hard. 别让发动机转得太快。