alloy

(noun) a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten. Synonyms: metal. Example: "Brass is an alloy of zinc and copper."

(noun) the state of impairing the quality or reducing the value of something. Synonyms: admixture.

(verb) lower in value by increasing the base-metal content. Synonyms: debase.

(verb) make an alloy of.