Where does “impregnableness” come from?

impregnableness (English) comes from English impregnable, from English impregnate, from Latin impraegnatus, from Latin impraegno, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en — in.

impregnableness (English): The state of being impregnable; impregnability

Definitions

  1. The state of being impregnable; impregnability

Ancestry of “impregnableness”, step by step

impregnableness traces back through two separate lines of ancestry.

via English impregnable

StepLanguageWordMeaning
1EnglishimpregnableToo strong to be penetrated; Capable of being...
2EnglishimpregnateTo cause to become pregnant; To fertilize; To...
3Latinimpraegnatusmade pregnant
4LatinimpraegnoI impregnate; I make pregnant
5Latinīn-un-, non-, not
6Latinînin, at, on, upon, from (space)
7Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
8Proto-Italicenin
9Proto-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 h₁énEvery word from Latin īn-Every word from Proto-Italic en