The Collaborative International Dictionary of English v.0.48:

Alloy \Al*loy"\, v. t. [imp. & p. p. Alloyed; p. pr. & vb. n.
   Alloying.] [F. aloyer, OF. alier, allier, later allayer,
   fr. L. aligare. See Alloy, n., Ally, v. t., and cf.
   Allay.]
   1. To reduce the purity of by mixing with a less valuable
      substance; as, to alloy gold with silver or copper, or
      silver with copper.
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   2. To mix, as metals, so as to form a compound.
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   3. To abate, impair, or debase by mixture; to allay; as, to
      alloy pleasure with misfortunes.
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