hardening

American  

[hahr-dn-ing] / ˈhɑr dn ɪŋ /

noun

1. a material that hardens another, as an alloy added to iron to make steel.

2. the process of becoming hard or rigid.

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hardening British  

/ ˈhɑːdənɪŋ /

noun

1. the act or process of becoming or making hard

2. a substance added to another substance or material to make it harder

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Etymology

Origin of hardening

First recorded in 1620–30; harden + -ing ¹

Example Sentences

With both sides hardening their positions and strikes continuing across the region, analysts warn the conflict could expand further unless diplomatic efforts emerge to de-escalate the fighting.

From Salon • Mar. 7, 2026

As migrant numbers grow, public attitudes appear to be hardening.

From Barron's • Feb. 16, 2026

Yet this hardening at the state level does not always translate neatly on the street.

From BBC • Feb. 8, 2026

But avalanche snow, which can start out loose and fluffy, consolidates quickly, hardening like concrete.

From Los Angeles Times • Jan. 6, 2026

“Now, in regards to hiding in the trunk of my car,” said Habib, his voice hardening.

From "Shooting Kabul" by N. H. Senzai

Related Words

• crystallization