"Relax" 是一个常用的表达，意思是"放松"、"不紧张"。它可以用作动词或名词。

这个词最早出现在中古英语时期，来自拉丁语"relaxare"，意思是"松弛"、"使松驰"。

下面是一些例句：

Relax, everything is going to be okay. (放松，一切都会好的。)
She took a hot bath to relax after a long day at work. (她在工作一天后洗了个热水澡以放松身心。)
I pke to psten to music to relax. (我喜欢听音乐以放松。)
He needs to find ways to relax before his big presentation. (他需要在大型演讲之前找到放松的方法。)

此外，还有一些其他常用的表达方式，意思也是"放松"、"不紧张"：

Take it easy. (放轻松。)
Chill out. (放松一下。)
Don't stress. (不要紧张。)

下面是这些表达的例句：

Take it easy, there's no need to rush. (放轻松，没必要急。)
Just chill out and enjoy the party. (放松一下，好好享受派对吧。)
Don't stress, I'm sure you'll do great on your exam. (不要紧张，我相信你考试会很棒的。)