Where does “unascendable” come from?

unascendable (English) comes from English ascendable, from English ascend, from Middle English ascenden, from Old French ascendre, from Latin ascendo, from Latin ad-, from Latin īn-, from Latin în — in.

unascendable (English): That cannot be ascended

Definitions

That cannot be ascended

Ancestry of “unascendable”, step by step

unascendable traces back through two separate lines of ancestry.

via English ascendable

Step	Language	Word	Meaning
1	English	ascendable	Capable of being ascended
2	English	ascend	To move upward, to fly, to soar; To slope in an...
3	Middle English	ascenden	—
4	Old French	ascendre	—
5	Latin	ascendo	I climb up, I go up, I move upwards; I rise,...
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- →