Where does “æfintýr” come from?

æfintýr (Old Norse) comes from Middle Low German êventü̂re, from Old French aventure, from Vulgar Latin adventura, from Late Latin adventurus, from Latin adventus, from Latin adveniō, from Latin ad-, from Latin īn- — in.

Ancestry of “æfintýr”, step by step

Step	Language	Word	Meaning
1	Middle Low German	êventü̂re	a noteworthy event
2	Old French	aventure	event, happening, adventure
3	Vulgar Latin	adventura	—
4	Late Latin	adventurus	adventure; about to arrive; an adventure
5	Latin	adventus	arrival, approach, advent; Advent
6	Latin	adveniō	to come to, to arrive
7	Latin	ad-	to; usually prefixed to verbs, in which cases it...
8	Latin	īn-	un-, non-, not
9	Latin	în	in, at, on, upon, from (space)
10	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
11	Proto-Italic	en	in
12	Proto-Indo-European	h₁én	in

Words derived from “æfintýr”

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