plenipotent

adjective

ple·​nip·​o·​tent pli-ˈni-pə-tənt 

: plenipotentiary

Word History

Etymology

borrowed from Late Latin plēnipotent-, plēnipotens, from Latin plēnus "full" + -i- -i- + potent-, potens "powerful" — more at full entry 1, potent entry 1

First Known Use

1639, in the meaning defined above