inbreed

verb (used with object), in·bred, in·breed·ing.

1. to breed (individuals of a closely related group) repeatedly.
2. to breed within; engender.

verb (used without object), in·bred, in·breed·ing.

3. to engage in or undergo inbreeding.

verb -breeds, -breeding or -bred

1. to breed from unions between closely related individuals, esp over several generations
2. (tr) to develop within; engender