Where does “plenariness” come from?

plenariness (English) comes from English plenary, from Late Latin plenarius, from Latin plēnus, from Proto-Italic plēnos, from Proto-Indo-European pl̥h₁nós, from Proto-Indo-European pleh₁- — to fill.

plenariness (English): Quality or state of being plenary

Definitions

  1. Quality or state of being plenary

Ancestry of “plenariness”, step by step

plenariness traces back through two separate lines of ancestry.

via English plenary

StepLanguageWordMeaning
1EnglishplenaryFully attended; for everyone's attendance;...
2Late Latinplenariusfull, plenary; entire; absolute
3Latinplēnusfull; filled; complete
4Proto-Italicplēnosfull
5Proto-Indo-Europeanpl̥h₁nósfull
6Proto-Indo-Europeanpleh₁-to fill

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European pleh₁-Every word from Proto-Indo-European pl̥h₁nósEvery word from Proto-Italic plēnos