“格外”是一个副词，意思是比平常更加、特别。

"格外" is an adverb meaning more than usual or especially.

我们常用它来表示某个东西比一般情况更强、更明显，比如“格外高兴”。

We often use it to indicate something is stronger or more obvious than normal, such as in "格外高兴" (especially happy).