harden
verb (used with object)
to make hard or harder.
harden
1 American
[hahr-dn]
/ ˈhɑr dn /
verb (used with object)
-
hardens,
present (3rd person singular)
-
hardened,
past participle, past
-
hardening
present participle
-
to make hard or harder.
to harden steel.
- Antonyms:
- soften
-
to make pitiless or unfeeling.
to harden one's heart.
-
to make rigid or unyielding; stiffen.
The rigors of poverty hardened his personality.
-
to strengthen or confirm, especially with reference to character, intentions, feelings, etc.; reinforce.
- Antonyms:
- weaken
-
to make hardy, robust, or capable of endurance; toughen.
-
Military. to reinforce the structure of (a military or strategic installation) to protect it from nuclear bombardment.
verb (used without object)
-
hardens,
present (3rd person singular)
-
hardened,
past participle, past
-
hardening
present participle
-
to become hard or harder.
-
to become pitiless or unfeeling.
-
to become rigid or unyielding; stiffen.
His personality hardened over the years.
-
to become confirmed or strengthened.
His resistance hardened.
-
to become inured or toughened.
The troops hardened under constant fire.
-
Commerce. (of a market, prices, etc.)
-
to cease to fluctuate; firm.
When the speculators withdrew from the market, the prices hardened.
-
to rise higher.
-
Harden
2
American
[hahr-dn]
/ ˈhɑr dn /
noun
harden
1
British
/ ˈhɑːdən /
verb
-
to make or become hard or harder; freeze, stiffen, or set
-
to make or become more hardy, tough, or unfeeling
-
to make or become stronger or firmer
they hardened defences
-
to make or become more resolute or set
hardened in his resolve
-
(intr) commerce
-
(of prices, a market, etc) to cease to fluctuate
-
(of price) to rise higher
-
harden
2
British
/ ˈhɑːdən /
noun
Other Word Forms
Derived Forms
-
hardenabilitynoun
-
overhardenverb
-
rehardenverb
-
prehardenverb (used with object)
-
unhardenverb (used with object)
-
hardenableadjective
-
unhardenableadjective
Inflected Forms
Participles
Conjugated Forms
Present
-
hardensimple
-
hardenssimple
-
have hardenedperfect
-
has hardenedperfect
-
am hardeningprogressive
-
are hardeningprogressive
-
is hardeningprogressive
-
have been hardeningperfect progressive
-
has been hardeningperfect progressive
Past
-
hardenedsimple
-
had hardenedperfect
-
was hardeningprogressive
-
were hardeningprogressive
-
had been hardeningperfect progressive
Future
Etymology
Origin of harden
Middle English word dating back to 1150–1200; see origin at hard, -en 1
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.
See Examples For:
He said that evidence from a U.S. bout of high inflation in the 1970s shows that a series of shocks that raise prices can harden over time into permanently higher inflation.
From MarketWatch ● Jul. 31, 2026
The U.S. needs to maximize the use of Mythos and comparable models to harden its cyber defenses while it can, he added.
From The Wall Street Journal ● Jun. 28, 2026
Already, the excess heat in the tank has caused the MMA to harden and clog the failing tank’s valves, rendering it impossible for crews to drain the dangerous chemical or add stabilizing agents, Freeman said.
From Los Angeles Times ● May 23, 2026
The drone attack is also likely to harden the stance of the UAE, which has grown increasingly hawkish since the war began.
From Barron's ● May 18, 2026
The nose would harden, and the ears would get stiff.
From "Ceremony:" by Leslie Marmon Silko
The Clippers sent 36-year-old James Harden, who was having his highest-scoring season in six years, to Cleveland in exchange for the 26-year-old Garland and a 2028 second-round selection.
From Los Angeles Times ● Jun. 21, 2026
Brown knew that Brunson was among the best one-on-one scorers in the NBA, and that Cleveland guard James Harden was notoriously slow-footed on defense.
From The Wall Street Journal ● May 20, 2026
The Knicks set screens to force Harden to switch onto Brunson—and then got out of the way to let their leader go to work.
From The Wall Street Journal ● May 20, 2026
Luke Harden, 36, died on Newchurch Road in Bacup, Lancashire, shortly after midnight on 1 November.
From BBC ● May 18, 2026
“Madam, Mrs. Harden says she has sent up the usual quantity.”
From "Jane Eyre" by Charlotte Brontë
To complicate matters, Klee, in 1935, began to suffer from the then‑fatal autoimmune disease scleroderma, which hardens and tightens the skin.
From The Wall Street Journal ● Jul. 8, 2026
The powder hardens almost instantly, remains stable during storage, and can be deployed quickly even in demanding environments such as combat zones and disaster areas.
From Science Daily ● Jul. 2, 2026
The sun hardens up the clay and creates a faster surface that generally favours bigger servers, more aggressive returners and players who hit with top-spin.
From BBC ● May 26, 2026
If it hardens, Apple is renting its future.
From MarketWatch ● Apr. 22, 2026
So does Velveeta, which is a cheese Jell-O that only sort of hardens.
From "Everything Sad Is Untrue" by Daniel Nayeri
Confidential,’” says Chhiu of the stunts in “Spider-Noir,” which follows Cage as a hardened private detective confronting the criminal underbelly of 1930s New York.
From Los Angeles Times ● Aug. 5, 2026
These weapons allow the US to conduct precision strikes against hardened military targets, such as command bunkers or fortified military facilities, without putting manned aircraft in harm's way.
From BBC ● Jul. 27, 2026
"The hawkish core of the Fed has not only hardened but it's broadened," said Swonk, who expects two rate hikes later this year.
From Barron's ● Jul. 26, 2026
Finish them off with flaky sea salt, then store them in the freezer for 30 minutes or until the outer chocolate shell has hardened.
From Salon ● Jul. 20, 2026
You could live even if your second heart stopped and the spirit hardened in your veins.
From "Strange the Dreamer" by Laini Taylor
"Iran's work there has likely centred around continued internal excavation and hardening of the facility that would provide further protection against aerial attacks."
From BBC ● Aug. 1, 2026
To be sure, Russia has adapted by improving electronic warfare, hardening facilities, expanding drone production and developing new glide-bomb tactics.
From The Wall Street Journal ● Jul. 7, 2026
Horvath said the county hopes to receive tens of millions of dollars in state funding for additional brush clearance, fuel modification, home hardening and other initiatives.
From Los Angeles Times ● Jun. 26, 2026
UV light is used for air purification, curing resins in 3D printing, hardening gels in dental fillings, and even applications such as nail treatments.
From Science Daily ● Jun. 26, 2026
They curled about his body, thickening and hardening into bark.
From "The Last Olympian" by Rick Riordan
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
