wrack (one's) brain(s)

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wrack (one's) brain(s)

To struggle very hard to recall or think of something. ("Rack" is considered the more correct spelling, though "wrack" has become acceptable through common usage.) I've been wracking my brain, but I still can't remember what Lydia's husband's name is. He wracked his brains all weekend trying to think of a solution to the problem.
See also: wrack
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

wrack (one's) brains

/brain
To try hard to remember or think of something.
See also: brain, wrack
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
Don't wrack your brains for a 'meaning,' because often that will come later on.
An early shot tested the 'keeper then you wrack your brains to think of the contribution he made.
It's handy too, for if you buy this book you will never again have to wrack your brains for something nice to write in a birthday card!