Where does “unassailableness” come from?

unassailableness (English) comes from English unassailable, from English assailable, from English assail, from Middle English assailen, from Old French assalir, from Latin assaliō, from Latin ad-, from Latin īn- — in.

unassailableness (English): State or quality of not being assailable

Definitions

  1. State or quality of not being assailable

Ancestry of “unassailableness”, step by step

unassailableness traces back through two separate lines of ancestry.

via English unassailable

StepLanguageWordMeaning
1EnglishunassailableSecure against attack; impregnable; Undeniable,...
2EnglishassailableAble to be assailed or attacked
3EnglishassailTo attack with harsh words or violent force
4Middle EnglishassailenTo assail or assault; to loot or attack; To begin...
5Old Frenchassalirto jump on; to attack; to assault
6Latinassaliōto jump on, attack
7Latinad-to; usually prefixed to verbs, in which cases it...
8Latinīn-un-, non-, not
9Latinînin, at, on, upon, from (space)
10Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
11Proto-Italicenin
12Proto-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 Latin ad-
unassailableness — Etymology, Origin & Word History | Etymology Explorer