Where does “plenipotentiarily” come from?

plenipotentiarily (English) comes from English plenipotentiary, from Medieval Latin plenipotentiarius, from Classical Latin plēnipotēns, from Latin potēns, from Latin posse, from Latin potis, from Proto-Italic potis, from Proto-Indo-European pótis — to drink.

plenipotentiarily (English): In a plenipotentiary manner

Definitions

  1. In a plenipotentiary manner

Ancestry of “plenipotentiarily”, step by step

plenipotentiarily traces back through two separate lines of ancestry.

via English plenipotentiary

StepLanguageWordMeaning
1EnglishplenipotentiaryA person invested with full powers, especially as...
2Medieval Latinplenipotentiariushaving full power
3Classical Latinplēnipotēns
4Latinpotēnsbeing able (to), able; potent, mighty, strong, powerful
5Latinpossepresent active infinitive of possum  "to be able...
6Latinpotisable, capable, possible
7Proto-Italicpotismaster, in control of
8Proto-Indo-Europeanpótismaster, ruler; husband
9Proto-Indo-Europeanph₃tis
10Proto-Indo-Europeanpeh₃-to drink

via English ly

StepLanguageWordMeaning
1EnglishlyAbbreviation of light-year
2VietnameselyAlternative spelling of li
Every word from Proto-Indo-European peh₃-Every word from Proto-Indo-European ph₃tisEvery word from Proto-Indo-European pótis