A hatter is someone who makes or sells hats. It is an old trade-name, like baker or potter: the -er marks the person whose work is hats. You still meet it in history, in shop names, and in stories.

A hatterhatter（帽匠） is someone who makes or sells hats是做帽子或賣帽子的人 It is an old trade-name, like baker or potter這是一個古老的職業名稱，就像baker或potter一樣 the -er marks the person whose work is hats字尾-er標示出這個人的工作跟帽子有關 You still meet it你還是會看到這個字 in history, in shop names, and in stories在歷史、店名，還有故事裡

The famous saying mad as a hatter comes from a real, ugly fact: hat-makers once used a mercury mix that could damage the nerves, so some hatters shook and spoke strangely. Alice in Wonderland’s Mad Hatter plays on that saying.

The famous saying mad as a hatter那句有名的俗語mad as a hatter（瘋得像帽匠） comes from a real, ugly fact來自一個真實又難堪的事實 hat-makers once used a mercury mix that could damage the nerves帽匠以前會用一種含汞的混合物，可能傷害神經 so some hatters shook and spoke strangely所以有些帽匠會發抖、講話怪怪的 Alice in Wonderland's Mad Hatter《愛麗絲夢遊仙境》裡的瘋帽匠 plays on that saying就是在玩這句俗語的哏

In ordinary modern talk we more often say hat maker or the person at the hat shop — hatter sounds a little old or story-like, but it is still the right word for the trade. (There is an old dialect verb hatter meaning “to tangle,” from a different root; that is not this job.)

In ordinary modern talk we more often say hat maker or the person at the hat shop在現代的日常用語裡，我們比較常說hat maker，或就說帽子店那個人 hatter sounds a little old or story-likehatter聽起來有點老派、像故事裡的說法 but it is still the right word for the trade但作為這個行業的用字，還是正確的 (There is an old dialect verb hatter meaning "to tangle," from a different root另外還有一個古老方言動詞hatter，意思是「弄亂」，來自不同的字源 that is not this job那跟這個職業沒有關係)