stiffen

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

Definition of stiffen

intransitive verb

: to become stiff or stiffer

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Other Words from stiffen

stiffener \ ˈsti-​fə-​nər How to pronounce stiffener (audio) , ˈstif-​nər \ noun

Synonyms & Antonyms for stiffen

Synonyms

harden, harshen, strengthen, toughen

Antonyms

ameliorate, ease

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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.
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Recent Examples on the Web

The most famous was the second, a group of intellectuals who helped stiffen the resolve of Americans to resist and roll back Soviet Communism in the 1970s and 1980s. Jonathan S. Tobin, National Review, "Don’t Dismiss Communist China’s Critics," 23 July 2019 Feeling tightness around the joints, lower back pain, difficulty straightening out bent knees, and knees that stiffen while bent are all common signs. Elissa Sanci, Woman's Day, "7 Early Symptoms of MS In Women," 13 June 2019 Just then, as her body appears ready to topple forward, a mechanical appendage uncoils from beneath her dress and stiffens behind her like a wooden plank, steadying her from a fall. courant.com, "Japanese researchers want to give your grandma a robotic monkey tail," 21 Aug. 2019 The prosecutor also criticized Mathews' claim that Sherin's body stiffened within minutes after her death. Lavendrick Smith, Dallas News, "Richardson dad who let 3-year-old Sherin Mathews die 'over milk' gets life in prison," 26 June 2019 Medina however stiffened once more, collecting a strikeout and a fly ball to himself. Robert Avery, Houston Chronicle, "In lights out fashion, Pearland East 10s capture Section 3 championship," 9 July 2019 Afterward, the Wilks family hired a lobbyist to push for a law that would stiffen penalties for trespass. Julie Turkewitz, New York Times, "Who Gets to Own the West?," 22 June 2019 But Crawford was removed when his throwing shoulder stiffened. Henry Schulman, SFChronicle.com, "Giants crushed in Philly, drop series for the first time since June," 1 Aug. 2019 This makes starches handy as a gluing and stiffening agent for paper. Scientific American, "Put Edible Paper to the Test," 18 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'stiffen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of stiffen

15th century, in the meaning defined at transitive sense

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More Definitions for stiffen

stiffen

verb

English Language Learners Definition of stiffen

: to stop moving and become completely still especially because of fear, anger, etc.
: to become painful to move or use
: to become more severe or strong or to make (something) more severe or strong

stiffen

verb
stiff·​en | \ ˈsti-fən How to pronounce stiffen (audio) \
stiffened; stiffening

Kids Definition of stiffen

1 : to make or become stiff or stiffer The paper stiffened as it dried.
2 : to become tense and still He stiffened with suspicion.

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