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.
For every mention of the Chicago Bulls’ trek toward toughness, of their hopes to stiffen the chests in the building and ignite a defensive revamp, Okoro has been the footnote. Joel Lorenzi, New York Times, 7 Oct. 2025 McDaniel made the point that the Dolphins’ defensive line and run defense stiffened somewhat after struggling badly on the first drive. Barry Jackson, Miami Herald, 3 Oct. 2025 Afterwards, a squaring solution—a powdery mixture of water and a gel-like batter used in the decorative cake business—is applied to the inside of the hat’s crown to act as a stiffening agent. Eric Twardzik, Robb Report, 3 Oct. 2025 But the schedule stiffens up next week with the start of 4A South Metro League play as Heritage, Ponderosa and Dakota Ridge all loom in October. Matt Schubert, Denver Post, 26 Sep. 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 9 Oct. 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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