Webster’s Revised Unabridged Dictionary · 1913
Mongrel
Mon′grel (mŭn̲′grĕl), n. [Prob. shortened fr. mongrel, and akin to AS. mengan to mix, and E. mingle. See Mingle.] The progeny resulting from a cross between two breeds, as of domestic animals; anything of mixed breed. Drayton.
Mon′grel, a. 1. (Zoöl.) Not of a pure breed.
2. Of mixed kinds; as, mongrel language.