1
as in to freeze
to become physically firm or solid
the glue begins to harden as soon as it is exposed to air
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2
as in to strengthen
to make able to withstand physical hardship, strain, or exposure
pioneer women who had been hardened by years of living on the plains
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3
as in to toughen
to increase the ability of (as a muscle) to exert physical force
arm muscles that were hardened by all the years of casting and hauling his fishing nets
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4
as in to stiffen
to make more harsh, uncompromising, or severe
the government hardened restrictions on travel to and from the war-torn nation
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Example Sentences
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Recent Examples of harden
While the healing process can be beneficial in securing the implant in place, the scar tissue can also harden and contract around the insert, causing difficulties in regards to aesthetics — as well as pain — per the site.
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Michelle Lee, People.com, 12 May 2025
Now, with legal challenge after legal challenge, more and more people are getting hardened against this, and saying, ‘This isn’t O.K.
—Jessica Winter, New Yorker, 10 May 2025
With both sides hardening their positions, the risk of open conflict is growing, and the coming weeks may determine whether de-escalation is possible—or if confrontation becomes inevitable.
—Amir Daftari, MSNBC Newsweek, 9 May 2025
Flashes of orange lava leaked through the seafloor before hardening in the freezing water, indicating an eruption was taking place.
—Kameryn Griesser, CNN Money, 8 May 2025
See All Example Sentences for harden
Michelle Lee, People.com, 12 May 2025
Now, with legal challenge after legal challenge, more and more people are getting hardened against this, and saying, ‘This isn’t O.K.
—Jessica Winter, New Yorker, 10 May 2025
With both sides hardening their positions, the risk of open conflict is growing, and the coming weeks may determine whether de-escalation is possible—or if confrontation becomes inevitable.
—Amir Daftari, MSNBC Newsweek, 9 May 2025
Flashes of orange lava leaked through the seafloor before hardening in the freezing water, indicating an eruption was taking place.
—Kameryn Griesser, CNN Money, 8 May 2025
See All Example Sentences for harden
Recent Examples of Synonyms for harden
Verb
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The raises are cost-of-living adjustments included in state law, though past legislatures have voted to freeze their own pay — a move that has drawn legal challenges.—
Dan Petrella,
Chicago Tribune,
1 June 2025
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In parallel, the Trump administration has reportedly frozen more than $2 billion in research grants to elite universities, including Harvard, citing alleged violations of federal directives related to antisemitism and national security, NPR reported.—
Michelle Mbekeani,
Forbes.com,
1 June 2025
Verb
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Police Chief Neil Noakes spent two decades in uniform, working to reduce violent crimes, support officers’ mental wellness, and strengthen trust in Fort Worth.—
Shambhavi Rimal,
Fort Worth Star-Telegram,
28 May 2025
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Renee advises strengthening organizations by defining behavioral standards and ensuring policies reinforce a culture of respect.—
Nia Bowers,
USA Today,
28 May 2025
Verb
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The schedule stiffens considerably over the back half of the season.—
Mark Zeigler,
San Diego Union-Tribune,
16 May 2025
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Lucy’s Law, among other things, stiffens the penalties for seriously injuring someone in a boat crash.—
David Goodhue,
Miami Herald,
9 May 2025
Cite this Entry
“Harden.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/harden. Accessed 4 Jun. 2025.
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