Where does “unassurance” come from?

unassurance (English) comes from English assurance, from Middle English assuraunce, from Old French asseürance, from Old French asseürer, from Vulgar Latin *assēcūrāre, from Latin ad-, from Latin īn-, from Latin în — in.

unassurance (English): Lack of assurance; the feeling of being unassured

Definitions

Lack of assurance; the feeling of being unassured

Ancestry of “unassurance”, step by step

unassurance traces back through two separate lines of ancestry.

via English assurance

Step	Language	Word	Meaning
1	English	assurance	The act of assuring; a declaration tending to...
2	Middle English	assuraunce	—
3	Old French	asseürance	Alternative form of asseurance
4	Old French	asseürer	Alternative form of asseurer
5	Vulgar Latin	*assēcūrāre	—
6	Latin	ad-	to; usually prefixed to verbs, in which cases it...
7	Latin	īn-	un-, non-, not
8	Latin	în	in, at, on, upon, from (space)
9	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
10	Proto-Italic	en	in
11	Proto-Indo-European	h₁én	in

via English un

Step	Language	Word	Meaning
1	English	un	One

Every word from Proto-Indo-European h₁én →Every word from Latin īn- →Every word from Latin ad- →