knuckle down

verb

knuckled down; knuckling down; knuckles down
Synonyms of knuckle downnext

intransitive verb

: to apply oneself earnestly

Examples of knuckle down in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
There is every chance Pepi may decide to knuckle down and keep pushing De Jong, as PSV chase a successful defense of their title and progress in the Champions League. — Jeff Rueter, The Athletic, 14 Jan. 2025 Rooney knuckled down and was United’s best player for the first half of the following season. — Daniel Taylor, The Athletic, 29 Dec. 2024

Word History

First Known Use

circa 1864, in the meaning defined above

Time Traveler
The first known use of knuckle down was circa 1864

Rhymes for knuckle down

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Browse Nearby Words

knucklebone
knuckle down
knuckle-dust
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Cite this Entry

“Knuckle down.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/knuckle%20down. Accessed 28 Mar. 2025.

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Kids Definition

knuckle down

verb
: to apply oneself in an earnest manner

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