inbreed

/ɪnˈbriːd/
verb
  1. To breed from closely related individuals, especially over many generations.
    • Scientists warn that to inbreed animals can lead to serious health defects.
    • Farmers sometimes inbreed cattle to maintain specific traits.
    • The royal family used to inbreed to keep power within the bloodline.
Synonyms
What does "inbreed" mean? | whatsthatwordmean | whatsthatwordmean