sororicide

noun

so·​ror·​i·​cide

səˈrȯrəˌsīd

plural -s

1

: the act of killing one's sister

2

: a person who kills his sister

Word History

Etymology

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)

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