動詞
词源
由 rack (“肢刑架”) 和 brain (“腦”) 組成，意思上可視作“使精神极度不适” 異體包括 rack one's wit (1583)、rack one's memory 和 cudgel one's brain / cudgel one's brains。
释义
絞盡腦汁；努力去想或記住某事
I have been racking my brain all day trying to think of a birthday present for her.
我整天都在绞尽脑汁想给她送什么生日礼物。
Let’s face it – math isn’t for everyone. If you’re done racking your brains over a question based on quadratic equations, differential calculus, or even lengthy word problems, and can’t for the life of you figure out what’s what, then perhaps it’s time you let ChatGPT take up the role of a home tutor.
让我们面对现实吧——数学并不适合每个人。如果你已经受够了为一道基于二次方程、微积分甚至冗长的应用题而绞尽脑汁，却怎么也搞不清楚到底是什么，那么也许是时候让ChatGPT来担任你的家庭教师了。
2023年 1月19日，Zohaib Ahmed，「Here’s how ChatGPT can help you deal with boring tasks so you can focus on things that matter [ChatGPT如何帮助你处理无聊的任务，让你可以专注于重要的事情]」，收錄於The Indian Express：
词形与写法（6）
| 词形 | 标注 | 转写 |
|---|---|---|
| rack one's brains | alternative | |
| wrack one's brain | proscribed · alternative | |
| wrack one's brains | proscribed · alternative | |
| racks one's brain | third-person · singular · present | |
| racking one's brain | present · participle | |
| racked one's brain | past · participle · 簡單過去時 |