帽子用英语可以翻译成"hat"。

例句：

I need to buy a new hat. 我需要买一个新帽子。
She wore a red hat to the party. 她在聚会上戴了一顶红帽子。
He took off his hat and hung it on the coat rack. 他摘下帽子，把它挂在衣帽架上。