Where does “abstenen” come from?

abstenen (Middle English) comes from Old French abstenir, from Latin abstineō, from Latin ab-, from Latin āb, from Proto-Germanic *ab, from Proto-Indo-European apó.

Ancestry of “abstenen”, step by step

abstenen traces back through two separate lines of ancestry.

via Old French abstenir

Step	Language	Word	Meaning
1	Old French	abstenir	to abstain from; to not participate in
2	Latin	abstineō	to abstain
3	Latin	ab-	from, away, away from; off; at a distance
4	Latin	āb	from, away from, out of
5	Proto-Germanic	*ab	—
6	Proto-Indo-European	apó	—

via Old French astenir

Step	Language	Word	Meaning
1	Old French	astenir	Alternative form of abstenir

Every word from Proto-Indo-European apó →Every word from Proto-Germanic *ab →Every word from Latin āb →