cudgel one's brains

phrase

: to think hard (as for a solution to a problem)

Word History

First Known Use

1604, in the meaning defined above

Time Traveler
The first known use of cudgel one's brains was in 1604

Browse Nearby Words

Cite this Entry

“Cudgel one's brains.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cudgel%20one%27s%20brains. Accessed 26 Aug. 2026.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster