alloy

noun

1. (countable, uncountable)A metal that is a combination of two or more elements, at least one of which is a metal, a base metal.
2. (archaic, countable, uncountable)A metal of lesser value, mixed with a metal of greater value.

   “gold without alloy”

   “Many of these coins are preserved at the British Museum, in London, and at the Ashmolean Museum, in Oxford, and are all of pure gold, without alloy, and in a good state of preservation. Boadicea, Queen of the Iceni, is also said to have[…]”

3. (countable, uncountable)An admixture; something added which stains, taints etc.

   “Metrodorus said that in sadnesse there is some aloy of pleasure.”

   “The sole grievance and alloy thus removed in the prospect of Harriet’s welfare, she was really in danger of becoming too happy for security.”

4. (countable, figuratively, uncountable)Fusion, marriage, combination.

   “SETH KITANGE TELEVISION AND RADIO Upheaval at CBS. […] Bill Moyers, a CBS News commentator and special correspondent, expressed his dismay in an interview with Newsweek in which he said, “Television news has never been pure. It has always been an alloy of journalism and show business.””

verb

1. To mix or combine; often used of metals.
2. To reduce the purity of by mixing with a less valuable substance.

   “to alloy gold with silver or copper, or silver with copper”

3. (figuratively)To impair or debase by mixture.

   “to alloy pleasure with misfortunes”

   “In seasons of cheerfulness, no temper could be more cheerful than hers, or possess, in a greater degree, that sanguine expectation of happiness which is happiness itself. But in sorrow she must be equally carried away by her fancy, and as far beyond consolation as in pleasure she was beyond alloy.”