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sinew

American  
[sin-yoo] / ˈsɪn yu /

noun

  1. a tendon.

  2. Often sinews. the source of strength, power, or vigor.

    the sinews of the nation.

  3. strength; power; resilience.

    a man of great moral sinew.


verb (used with object)

  1. to furnish with sinews; strengthen, as by sinews.

sinew British  
/ ˈsɪnjuː /

noun

  1. anatomy another name for tendon

  2. (often plural)

    1. a source of strength or power

    2. a literary word for muscle

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Etymology

Origin of sinew

before 900; Middle English; Old English sinu (nominative), sinuwe (genitive); cognate with Dutch zenuw, German Sehne, Old Norse sin; akin to Sanskrit snāva sinew

Explanation

The tendon that connects muscles to bone is also called sinew. The noun is also used to suggest strength and resilience, and is sometimes used as a literary term for muscle, literal or metaphorical, as in “a nation’s sinew.” Sinew derives from before 900 CE, with relatives found in the Dutch zenuw and the Old High German senawa. Our present spelling worked its way through the Old English seonowe to become the Middle English sinewe. Aside from its anatomical meaning, this word is often used to present an image of strength and power, evident in filmmaker Ingmar Bergman’s statement, “I write scripts to serve as skeletons awaiting the flesh and sinew of images.”

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Vocabulary lists containing sinew

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Reacting later on Wednesday, Home Secretary Shabana Mahmood insisted the government will "strain every sinew" to keep the Jewish community safe following the attack.

From BBC • Apr. 29, 2026

She became the party’s spine and its sinew, holding together the Democrat’s many warring factions and standing firm at times the more timorous were prepared to back down.

From Los Angeles Times • Nov. 6, 2025

The nearly photorealistic face of Senua, the unconventional hero of this 10th-century revenge tale, as she grimaces with every sinew taut, her veins bulging.

From New York Times • May 20, 2024

Ngannou's legs folded underneath him, more than 19 stone of bone, sinew and muscle going limp.

From BBC • May 8, 2024

Between them I put ten olivella shells, which were no longer than the tip of my little finger, and threaded them all together with sinew.

From "Island of the Blue Dolphins" by Scott O'Dell

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