stiffen
verb (used with object)
to make stiff.
stiffens
-
present tense formof stiffen (3rd person singular).present tense
Used to describe things happening now or regularly.
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.
The illness causes breathing difficulties and creates scar tissue that stiffens the lungs, making it difficult to breathe and for oxygen to enter the bloodstream.
From BBC ● Jun. 10, 2026
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
When the cell enters the next interphase and the asters reform, the cytoplasm stiffens again and stabilizes the band.
From Science Daily ● Feb. 28, 2026
But today, instead of her usual greeting, Did you sleep well, Uhmma’s back stiffens and she quickly puts something into a brown paper bag she is holding at her side.
From "A Step from Heaven" by An Na
