英语短语 "against one's will" 的核心含义是"违背某人的意愿""、"不情愿地"或"被迫地"，用来描述行为或状态与当事人的主观意愿相冲突。
against：介词，表"违反、对抗"；
one's will："某人的意愿"（one's需替换为形容词性物主代词，如my/his/her/their等）。
该短语通常在句中作状语，修饰谓语动词或整个句子，强调行为的"非自愿性"。常见结构有：
主动句：主语（行为人）"违背自己的意愿"做某事；
被动句：主语（受事人）"被违背意愿"经历某事。
He took the job against his will because he needed money.
（他因为需要钱，违背意愿接受了这份工作。）
I apologized to him against my will—he was the one who was wrong!
（我不情愿地向他道歉——明明是他的错！）
She was forced to marry against her will when she was 16.
（她16岁时被迫结婚，完全违背了自己的意愿。）
The children were taken away from their parents against their will.
（孩子们被强行从父母身边带走，违背了他们的意愿。）
The plan was approved against our will—we all opposed it.
（这个计划违背我们的意愿被通过了——我们都反对。）
unwillingly（副词，"不情愿地"）：He nodded unwillingly. = He nodded against his will.
reluctantly（副词，"勉强地"）：She agreed reluctantly. = She agreed against her will.
"against one's will" 突出"意愿被违背"的状态，既可以描述主动的"勉强行为"，也可以描述被动的"强迫经历"，是表达"非自愿"的常用短语。
一句话记住：做/被做某事时"不乐意、没同意"，就用"against one's will"！