Where does “unassailably” come from?

unassailably (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.

unassailably (English): In an unassailable manner

Definitions

  1. In an unassailable manner

Ancestry of “unassailably”, step by step

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
Every word from Proto-Indo-European h₁énEvery word from Latin īn-Every word from Latin ad-