to make something slightly wet

Rain had dampened the tent so we left it to dry in the afternoon sun. 雨水打湿了帐篷，午后我们把它放到太阳底下晒。

to make feelings, especially of excitement or enjoyment, less strong

Nothing you can say will dampen her enthusiasm. 不管你说什么她的热情丝毫不减。

I didn't want to dampen his spirits. 我不想给他泼冷水。