Decease means death, but it is a stiff paper word, not a kitchen-table word. You meet it in law, hospital forms, and very formal writing: upon the decease of the owner, date of decease.

Decease means deathDecease的意思是死亡 but it is a stiff paper word但這是個生硬的公文用詞 not a kitchen-table word不是餐桌上會說的話 You meet it你會遇到它 in law, hospital forms, and very formal writing在法律文件、醫院表格，和非常正式的寫作裡 upon the decease of the owner像是「物主身故之時」 date of decease「死亡日期」

A family talking about someone they love would say when he died, after her death, or she passed away — not after her decease.

A family talking about someone they love談到自己所愛的人時，一個家庭 would say會說 when he died他過世的時候 after her death她死後 or she passed away或是她走了 not after her decease而不會說她身故之後

There is also a verb, to decease, meaning to die, but it is even rarer and sounds old, as if copied from a document.

There is also a verb, to decease也有一個動詞to decease meaning to die意思是死去 but it is even rarer但它更罕見 and sounds old聽起來很老派 as if copied from a document好像是照著公文抄下來的

People reach for this word when they want distance and politeness, as if dying were a kind of leaving, which is the old idea behind it. In speech it can sound cold, or like you are showing off a legal vocabulary.

People reach for this word人們就會用這個詞 when they want distance and politeness當他們想要保持距離、顯得有禮貌時 as if dying were a kind of leaving好像死亡是一種離開 which is the old idea behind it這正是它背後的舊觀念 In speech在口語裡 it can sound cold這個詞可能聽起來很冷漠 or like you are showing off a legal vocabulary或像是在炫耀法律詞彙