"interbred" in the verb sense
1. crossbreed, cross, hybridize, hybridise, interbreed
breed animals or plants using parents of different races and varieties
"cross a horse and a donkey"
"Mendel tried crossbreeding"
"these species do not interbreed"
"interbred" in the adjective sense
bred of closely related parents
Source: WordNet® (An amazing lexical database of English)
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