[verb] [past:] interbred - to breed or cause to breed with members of another breed or groupThe black crows had interbred with a lighter subspecies, producing birds with grey feathers. [I]Farmers were interbreeding less hardy cattle with native breeds. [T]
INTERBREED
Meaning of INTERBREED in English
Cambridge English vocab. Кембриджский английский словарь. 2012