Where does “plenitude” come from?

plenitude (Middle English) comes from Latin plenitudo, from Latin plēnus, from Proto-Italic plēnos, from Proto-Indo-European pl̥h₁nós, from Proto-Indo-European pleh₁- — to fill.

Ancestry of “plenitude”, step by step

StepLanguageWordMeaning
1Latinplenitudofullness, abundance, plenitude; thickness
2Latinplēnusfull; filled; complete
3Proto-Italicplēnosfull
4Proto-Indo-Europeanpl̥h₁nósfull
5Proto-Indo-Europeanpleh₁-to fill

Words derived from “plenitude”

Every word from Proto-Indo-European pleh₁- →Every word from Proto-Indo-European pl̥h₁nós →Every word from Proto-Italic plēnos →
plenitude — Etymology, Origin & Word History | Etymology Explorer