tyrannicide

noun

ty·​ran·​ni·​cide tə-ˈra-nə-ˌsīd 

tī-

1

: the act of killing a tyrant

2

: the killer of a tyrant

Word History

Etymology

in sense 1, from French, from Latin tyrannicidium, from tyrannus + -i- + -cidium -cide (killing); in sense 2, from French, from Latin tyrannicida, from tyrannus + -i- + -cida -cide (killer)

First Known Use

1650, in the meaning defined at sense 1