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Definitions

stiffen

[stif-uhn] / ˈstɪf ən /


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.

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Depending on the situation, the material can bend, buckle, or stiffen in different ways, all without electronics, sensors, or active control systems.

From Science Daily Jun. 11, 2026

If Powell stays, that arithmetic becomes even harder, and it could stiffen the resolve of other governors whose terms run beyond Powell’s, said Wilcox.

From The Wall Street Journal Apr. 27, 2026

She has also vowed to stiffen prison sentences and to impose a state of emergency in areas worst hit by crime.

From Barron's Feb. 1, 2026

Calling the eradication of extortion “one of the great challenges” facing Mexico, Sheinbaum pledged to bolster enforcement, stiffen penalties and increase safeguards for anyone receiving threats.

From Los Angeles Times Dec. 16, 2025

I stiffen from the soles of my feet to the crown of my head.

From "Like Vanessa" by Tami Charles

The biggest reason is that our maximum heart rate slows with age, and the heart muscle stiffens, reducing its pumping effectiveness.

From Barron's May 23, 2026

More than 13% of Americans 75 and older have the condition, in which the aortic valve stiffens and narrows.

From The Wall Street Journal Apr. 25, 2026

Over time, inflammation can progress to fibrosis and scarring that stiffens the liver.

From Science Daily Mar. 7, 2026

Here, there’s actually a very good doom metal electronic score by John Murphy and David Fleming, but the movie stiffens up whenever it needs to get real.

From Los Angeles Times Jul. 8, 2025

We stand there until her body stiffens and she pulls away.

From "The Belles" by Dhonielle Clayton

The Romans, their ranks stiffened by Genoese and Venetian troops, did their best to resist.

From The Wall Street Journal Aug. 5, 2026

When the heart must work harder because of exercise, heat, stress or another cause, stiffened blood vessels may be less able to accommodate the increased blood flow.

From Science Daily Aug. 1, 2026

They reckon it may have stiffened the resolve of the German public and discouraged rebels within the dying Nazi regime.

From MarketWatch Mar. 12, 2026

Europe’s spine stiffened in part because 2025 exceeded expectations economically, says Jeremie Peloso, chief European strategist at BCA Research.

From Barron's Mar. 7, 2026

Nine hours of gripping the crutch handles had stiffened his hands to claws.

From "Pax" by Sara Pennypacker

IPF is a chronic, progressive lung disease characterized by irreversible scarring and stiffening of lung tissue.

From Barron's Mar. 30, 2026

It’s hard to imagine a greater accomplishment than to achieve peace while stiffening the sinews of deterrence.

From The Wall Street Journal Mar. 1, 2026

It smashed 300-pound spheres swinging on a pendulum into a fuselage panel to deliberately damage it, causing one of the stiffening rods to break, then repeatedly applied loads representative of those in flight 40,000 times.

From Seattle Times Apr. 15, 2024

Further analysis showed that the discs from diabetic rats exhibited a stiffening of collagen fibrils, with a higher concentration of non-enzymatic cross-links.

From Science Daily Feb. 13, 2024

Mia’s back was still to them, the water rushing over her hands, but all four of the children saw it: a slight stiffening of her posture, as if a string had been tightened.

From "Little Fires Everywhere" by Celeste Ng




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