Where does “plēnipotēns” come from?

plēnipotēns (Classical Latin) comes from Latin potēns, from Latin posse, from Latin potis, from Proto-Italic potis, from Proto-Indo-European pótis, from Proto-Indo-European ph₃tis, from Proto-Indo-European peh₃- — to drink.

Ancestry of “plēnipotēns”, step by step

plēnipotēns traces back through two separate lines of ancestry.

via Latin potēns

StepLanguageWordMeaning
1Latinpotēnsbeing able (to), able; potent, mighty, strong, powerful
2Latinpossepresent active infinitive of possum  "to be able...
3Latinpotisable, capable, possible
4Proto-Italicpotismaster, in control of
5Proto-Indo-Europeanpótismaster, ruler; husband
6Proto-Indo-Europeanph₃tis
7Proto-Indo-Europeanpeh₃-to drink

via Latin plēnus

StepLanguageWordMeaning
1Latinplēnusfull; filled; complete
2Proto-Italicplēnosfull
3Proto-Indo-Europeanpl̥h₁nósfull
4Proto-Indo-Europeanpleh₁-to fill

Words derived from “plēnipotēns

Every word from Proto-Indo-European peh₃-Every word from Proto-Indo-European ph₃tisEvery word from Proto-Indo-European pótis
plēnipotēns — Etymology, Origin & Word History | Etymology Explorer