Where does “unavertable” come from?

unavertable (English) comes from English avertable, from English avert, from Middle English averten, from Old French avertir, from Latin advertō, from Latin ad-, from Latin īn-, from Latin în — in.

unavertable (English): That cannot be averted or turned aside

Definitions

That cannot be averted or turned aside

Ancestry of “unavertable”, step by step

unavertable traces back through two separate lines of ancestry.

via English avertable

Step	Language	Word	Meaning
1	English	avertable	Preventable
2	English	avert	To turn aside or away; To ward off, or prevent,...
3	Middle English	averten	—
4	Old French	avertir	to inform; to notify; to notice; to remark
5	Latin	advertō	to turn to or towards
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- →