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to rack one's brain
01
知恵を絞る
to think hard or make a great effort to remember or solve something
![to [rack] {one's} [brain] definition and meaning](https://cdn.langeek.co/photo/29665/original/?type=jpeg "to [rack] {one's} [brain] definition and meaning")
What is the origin of the idiom "rack one's brain" and when to use it?
The origin of the idiom "rack one's brain" is believed to be derived from the medieval torture device known as the "rack." The rack was a mechanical contraption used to stretch or torture individuals by applying extreme tension to their bodies. The phrase represents the mental strain and anguish that one experiences when trying to recall or solve something difficult, similar to the physical agony inflicted by the rack. It is commonly used when someone is faced with a challenging problem, a difficult riddle, or the need to recall specific information from memory.
例
We've been racking our brains trying to figure out the answer to this tricky crossword puzzle clue.
I had been racking my brain for the actor's name, and when it finally came to me, I said, 'Bingo!'
I've been racking my brain all day trying to remember where I put my car keys.
He's been racking his brain, trying to recall the name of the actor in that movie.
