sororicide

noun
so·​ror·​i·​cide | \ səˈrȯrəˌsīd\
plural -s

Definition of sororicide

1 : the act of killing one's sister
2 : a person who kills his sister

History and Etymology for sororicide

in sense 1, from Medieval Latin sororicidium, from Latin soror sister + -i- + -cidium -cide (killing); in sense 2, from Latin sororicida, from soror + -i- + -cida -cide (killer)

Keep scrolling for more