yí​jiǔ​zú

to exterminate nine generations of a family

  1. to exterminate
    (bound form) to wipe out; to eliminate; to execute a whole family
  2. nine degrees of kinship
    The nine generations of direct relatives, including oneself, four generations above (father through great-great-grandfather), and four generations below (son through great-great-grandson); sometimes includes relatives from the mother's and wife's families.