Where does “idempotentness” come from?

idempotentness (English) comes from English idempotent, from English potent, from Middle English potent, from Latin potēns, from Latin posse, from Latin potis, from Proto-Italic potis, from Proto-Indo-European pótis — to drink.

idempotentness (English): idempotence

Definitions

  1. idempotence

Ancestry of “idempotentness”, step by step

idempotentness traces back through two separate lines of ancestry.

via English idempotent

StepLanguageWordMeaning
1Englishidempotent"Said of a function": describing an action which,...
2EnglishpotentPossessing strength; Powerfully effective; Having...
3Middle Englishpotentstaff, crutch
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 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 peh₃-