dissipate

/ˈdɪs.ə.peɪt/
to gradually become or make sth become weaker until it disappears （使）消散，消失；驱散
Eventually, his anger dissipated.
他的愤怒终于平息了。

~ sth
Her laughter soon dissipated the tension in the air.
她的笑声很快消除了紧张气氛。