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.
Lane picked up three on first down, but the Otay Ranch defense stiffened, turning back the next two runs for no gain. Kevin J. Farmer, San Diego Union-Tribune, 30 Aug. 2025 Competition has also been stiffening, the analyst added, which could be an additional tailwind for growth. Brian Evans, CNBC, 29 Aug. 2025 Steinman published a theoretical analysis of suspension-bridge stability, recommending that future bridge designs include deep trusses to stiffen the bridge deck and an open-grid roadway to reduce its wind resistance. Jenna Prestininzi, Freep.com, 26 Aug. 2025 Dalhausser, 45, needed a medical timeout early in the second set because his right shoulder began to stiffen up. Dan Arritt, Oc Register, 19 Aug. 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

Browse Nearby Words

Cite this Entry

“Stiffen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/stiffen. Accessed 9 Sep. 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

Last Updated: - Updated example sentences
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