Rheumatism is a wide, rather old word for long-lasting pain and stiffness in the joints or muscles — the kind that makes it hard to stand up, or that feels worse on cold, wet days. Older people still say “my rheumatism is playing up,” as if it were one familiar enemy.

Rheumatism風濕 is a wide, rather old word是一個範圍很廣、算是有點老派的詞 for long-lasting pain and stiffness指長期的疼痛與僵硬 in the joints or muscles發生在關節或肌肉 the kind that makes it hard to stand up這種疼痛會讓人很難站起來 or that feels worse on cold, wet days或在濕冷的天氣裡感覺更嚴重 Older people still say年紀大的人還是會說 "my rheumatism is playing up,"「我的風濕又犯了」 as if it were one familiar enemy好像它是一個熟悉的老對頭

Though actually, doctors today hardly use the word, because it bundles together many different problems we now name more exactly: worn joints, rheumatoid arthritis, gout, and others.

Though actually不過其實 doctors today hardly use the word現在的醫生很少用這個詞 because因為 it bundles together many different problems它把很多不同的問題都混在一起 we now name more exactly這些問題我們現在有更精確的名稱 worn joints磨損的關節 rheumatoid arthritis類風濕性關節炎 gout痛風 and others等等

The name comes from an old picture of the body in which a watery stuff (a “rheum”) was thought to flow into the joints and cause the ache. That is not how medicine thinks now, but the word stayed.

The name comes from這個名字來自 an old picture of the body一種古老的身體觀 in which在這種身體觀裡 a watery stuff一種水狀的東西 (a "rheum")（稱作「rheum」） was thought to flow into the joints被認為會流進關節裡 and cause the ache造成疼痛 That is not how medicine thinks now這不是現在醫學的想法了 but the word stayed但這個詞留了下來

It is not slang, and it is not rude; it just sounds a little dated in a clinic, and a little homely in the family.

It is not slang它不是俚語 and it is not rude也不是粗魯的說法 in a clinic在診間裡 it just sounds a little dated只是聽起來有點過時 and a little homely而有點親切家常 in the family在家人之間