Where does “uneasyness” come from?

uneasyness (English) comes from English uneasy, from Middle English unesy, from Middle English esy, from English ease, from Middle English ese, from Old French aise, from Latin adiacēns, from Latin adiaceo — in.

Ancestry of “uneasyness”, step by step

StepLanguageWordMeaning
1EnglishuneasyNot easy; difficult; Restless; disturbed by pain,...
2Middle Englishunesy
3Middle EnglishesyComfortable, pleasant; Convenient, suitable, fit;...
4EnglisheaseAbility, the means to do something, particularly;...
5Middle EnglisheseAlternative form of eise; Physical comfort, or...
6Old FrenchaiseAlternative form of eise; empty space, elbow...
7Latinadiacēnsadjacent, adjoining, neighbouring
8LatinadiaceoI lie beside, at, near or next to; am adjacent...
9Latinad-to; usually prefixed to verbs, in which cases it...
10Latinīn-un-, non-, not
11Latinînin, at, on, upon, from (space)
12Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
13Proto-Italicenin
14Proto-Indo-Europeanh₁énin
Every word from Proto-Indo-European h₁énEvery word from Latin īn-Every word from Latin ad-