alloy
noun
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A metal that is a combination of two or more elements, at least one of which is a metal.
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A metal of lesser value, mixed with a metal of greater value.
"gold without alloy"
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An admixture; something added which stains, taints etc.
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Fusion, marriage, combination.
verb
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To mix or combine; often used of metals.
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To reduce the purity of by mixing with a less valuable substance.
"to alloy gold with silver or copper, or silver with copper"
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To impair or debase by mixture.
"to alloy pleasure with misfortunes"