Where does “unassailable” come from?

Unassailable comes from English assailable, which derives from English assail, tracing back through Latin ad- (toward) to Proto-Indo-European ano- and óynos.

unassailable (English): Secure against attack; impregnable; Undeniable,...

Definitions

  1. Secure against attack; impregnable; Undeniable,...

Ancestry of “unassailable”, step by step

StepLanguageWordMeaning
1EnglishassailableAble to be assailed or attacked
2EnglishassailTo attack with harsh words or violent force
3Middle EnglishassailenTo assail or assault; to loot or attack; To begin...
4Old Frenchassalirto jump on; to attack; to assault
5Latinassaliōto jump on, attack
6Latinad-to; usually prefixed to verbs, in which cases it...
7Latinīn-un-, non-, not
8Latinînin, at, on, upon, from (space)
9Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
10Proto-Italicenin
11Proto-Indo-Europeanh₁énin

Words derived from “unassailable

Every word from Proto-Indo-European h₁énEvery word from Latin īn-Every word from Latin ad-
unassailable — Etymology, Origin & Word History | Etymology Explorer