Where does “infirmness” come from?

infirmness (English) comes from English infirm, from Latin infirmo, from Latin īnfirmus, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

infirmness (English): The quality of being infirm; feebleness

Definitions

  1. The quality of being infirm; feebleness

Ancestry of “infirmness”, step by step

infirmness traces back through two separate lines of ancestry.

via English infirm

StepLanguageWordMeaning
1EnglishinfirmWeak or ill, not in good health; Irresolute; weak...
2LatininfirmoI weaken, enfeeble, deprive of strength; I...
3Latinīnfirmusweak, feeble
4Latinīn-un-, non-, not
5Latinînin, at, on, upon, from (space)
6Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
7Proto-Italicenin
8Proto-Indo-Europeanh₁énin

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 h₁én