To individualize something is to change it so that it fits one particular person or case, instead of giving everyone the same thing.

To individualize something把某個東西「個別化」 is to change it就是去改變它，so that it fits one particular person or case讓它符合某一個特定的人或情況，instead of giving everyone the same thing而不是給每個人都一樣的東西。

A teacher individualizes lessons for a student who is ahead; a doctor individualizes the dose for a small patient; a company individualizes its emails so each one uses your name and your last order.

A teacher individualizes lessons for a student who is ahead老師會為程度超前的學生調整課程；a doctor individualizes the dose for a small patient醫生會為小病人調整劑量；a company individualizes its emails公司會客製化它的email，so each one uses your name and your last order讓每一封都用上你的名字和你上次的訂單。

You will meet it most often in education, medicine, and business writing — it is a somewhat formal word, and you would rarely say it while chatting with a friend. In everyday speech people say 'make it fit her', 'do it just for him', or use the near-twin word customize.

You will meet it most often你最常會遇到這個字 in education, medicine, and business writing在教育、醫療和商業文件裡；it is a somewhat formal word這是個稍微正式的字，and you would rarely say it while chatting with a friend跟朋友聊天時很少會這樣說。In everyday speech日常口語裡，people say 'make it fit her'人會說「幫她調整成適合她的」，'do it just for him'或「特別為他做」，or use the near-twin word customize或用意思很接近的customize。

There is a second, less common use: to individualize can mean to make something stand out as separate from the group — 'the painter individualizes every face in the crowd', meaning he gives each one its own look instead of painting a blur.

There is a second, less common use還有第二種比較少見的用法：to individualize can meanindividualize可以指 to make something stand out as separate from the group讓某個東西從一群裡凸顯出來、有別於整體——'the painter individualizes every face in the crowd'「畫家把人群裡的每張臉都個別化了」，meaning he gives each one its own look意思是他讓每一張臉都有自己的樣子，instead of painting a blur而不是畫成一片模糊。

Spelling: individualize in American English, individualise in British English. Both are correct; in Taiwan, textbooks usually follow American spelling.

Spelling拼法上：individualize in American English美式英文寫individualize，individualise in British English英式英文寫individualise。Both are correct兩種都對；in Taiwan在台灣，textbooks usually follow American spelling課本通常用美式拼法。