Hardening meaning

härdn-ĭng
The act or process of becoming hard or harder.
noun
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Something that hardens, as a substance added to iron to yield steel.
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Gradual exposure of plants to cold weather.
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A making or becoming hard.
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A substance used to harden something.
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Present participle of harden.
verb
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The process by which something hardens.
noun
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That which hardens, such as a material used for converting the surface of iron into steel.
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