harden

verb
hard·​en | \ ˈhär-dᵊn How to pronounce harden (audio) \
hardened; hardening\ ˈhärd-​niŋ How to pronounce hardening (audio) , ˈhär-​dᵊn-​iŋ \

Definition of harden

 (Entry 1 of 3)

transitive verb

1 : to make hard or harder
2 : to confirm in disposition, feelings, or action especially : to make callous hardened his heart
3a : inure, toughen harden troops
b : to inure to unfavorable environmental conditions (such as cold) often used with offharden off seedlings before transplanting
4 : to protect from blast, heat, or radiation (as by a thick barrier or placement underground)

intransitive verb

1 : to become hard or harder
2a : to become firm, stable, or settled
b : to assume an appearance of harshness or severity her face hardened at the thought
3 : to become gradually acclimatized to unfavorable conditions often used with offplants hardened off before the first frost

Harden

biographical name (1)
Har·​den | \ ˈhär-dᵊn How to pronounce Harden (audio) \

Definition of Harden (Entry 2 of 3)

Sir Arthur 1865–1940 English chemist

Harden

biographical name (2)

Definition of Harden (Entry 3 of 3)

Maximilian 1861–1927 originally Felix Ernst Witkowski German writer

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Synonyms & Antonyms for harden

Synonyms: Verb

Antonyms: Verb

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Examples of harden in a Sentence

Verb The presence of certain substances in the blood can cause the arteries to harden. These additives are designed to harden the steel. substances that can harden the arteries The news has hardened opposition to the government. He had been hardened by his years of military service.
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Recent Examples on the Web: Verb The sleeve hardens to form a continuous plastic liner along the old pipe’s inner walls. Robin Lloyd, Scientific American, "Health Concerns Mount as More Old Sewer Pipes Are Lined with Plastic," 25 Nov. 2019 Mr Trump’s presidency, and the impeachment inquiry, have further hardened partisan divisions and nationalised races that used to be parochial affairs. The Economist, "The Democratic victory in Louisiana is not a repudiation of Donald Trump," 21 Nov. 2019 But by the time the bill was withdrawn, the protests had hardened and broadened into a resistance movement against the territory’s government and Beijing. Ken Moritsugu, chicagotribune.com, "Hong Kong police tighten siege on protesters at university campus," 18 Nov. 2019 But by the time the bill was withdrawn, the protests had hardened and broadened into a resistance movement against the territory’s government and Beijing. Kelvin Chan, The Denver Post, "Campus under siege as Hong Kong police battle protesters," 18 Nov. 2019 But by the time the bill was withdrawn, the protests had hardened and broadened into a resistance movement against the territory’s government and Beijing. BostonGlobe.com, "Protesters advanced on the police from outside the cordon, while others emerged from the campus, their trademark umbrellas at the fore. Police in some places swooped in to subdue protesters and make arrests.," 18 Nov. 2019 But by the time the bill was withdrawn, the protests had hardened and broadened into a resistance movement against the territory’s government and Beijing. Ken Moritsugu, Anchorage Daily News, "Protesters try to leave Hong Kong campus but avoid arrest," 18 Nov. 2019 Democrats and Republicans are hardening their messages to voters, who are deeply entrenched in two camps. Mary Clare Jalonick, Twin Cities, "Pelosi says Trump’s Ukraine actions amount to ‘bribery’," 14 Nov. 2019 What’s more, partisan lines have hardened to an extent that is arguably unparalleled in the past century. Eric Schickler, The Conversation, "Investigations usually hurt a president’s public reputation – but Trump isn’t usual," 8 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'harden.' 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 harden

Verb

13th century, in the meaning defined at transitive sense 1

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Time Traveler for harden

Time Traveler

The first known use of harden was in the 13th century

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Statistics for harden

Last Updated

1 Dec 2019

Cite this Entry

“Harden.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/harden. Accessed 9 December 2019.

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More Definitions for harden

harden

verb
How to pronounce Harden (audio)

English Language Learners Definition of harden

: to become hard or firm or to make (something) hard or firm
: to become more definite and strongly felt or to make (something) more definite and strongly felt
: to make (someone) hard : to make (someone) less emotional and less likely to feel sorry for other people

harden

verb
hard·​en | \ ˈhär-dᵊn How to pronounce harden (audio) \
hardened; hardening

Kids Definition of harden

1 : to make or become hard or harder By now the cement has hardened.
2 : to make or become hardy or strong Years of tough work had hardened his muscles.
3 : to make or become stubborn or unfeeling She hardened her heart and refused to forgive him.

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More from Merriam-Webster on harden

Thesaurus: All synonyms and antonyms for harden

Rhyming Dictionary: Words that rhyme with harden

Spanish Central: Translation of harden

Nglish: Translation of harden for Spanish Speakers

Britannica English: Translation of harden for Arabic Speakers

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