stiffen

verb

stiff·​en ˈsti-fən How to pronounce stiffen (audio)
stiffened; stiffening ˈsti-fə-niŋ How to pronounce stiffen (audio)
ˈstif-niŋ

intransitive verb

: to become stiff or stiffer
stiffener
ˈsti-fə-nər How to pronounce stiffen (audio)
ˈstif-nər
noun

Examples of stiffen in a Sentence

She stiffened when he grabbed her shoulder. The dogs stiffened in alarm. The law would stiffen penalties for tax evasion.
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.
The sounds capture tiny mechanical vibrations, sometimes caused by stiffening arteries or narrowing heart vessels, that can indicate the early onset of disease. Carla Mendez, Sun Sentinel, 6 Aug. 2025 That combination of scarcity and desirability stiffens competition and drives up prices, DeJohn says. Talia Wexler, CNBC, 30 July 2025 That would allow Wiegman to stiffen the midfield with Grace Clinton or Jess Park, providing support for Walsh and Stanway. Michael Cox, New York Times, 6 July 2025 This allowed the company to add extra stiffening components, among other things, to keep everything flat and in place. IEEE Spectrum, 8 June 2025 See All Example Sentences for stiffen

Word History

First Known Use

15th century, in the meaning defined at transitive sense

Time Traveler
The first known use of stiffen was in the 15th century

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Cite this Entry

“Stiffen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/stiffen. Accessed 21 Aug. 2025.

Kids Definition

stiffen

verb
stiff·​en ˈstif-ən How to pronounce stiffen (audio)
stiffened; stiffening -(ə-)niŋ How to pronounce stiffen (audio)
: to make or become stiff or stiffer
stiffener noun

More from Merriam-Webster on stiffen

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