Where does “absēns” come from?

absēns (Latin) comes from Latin absum, from Latin ab-, from Latin āb, from Proto-Germanic *ab, from Proto-Indo-European apó.

absēns (Latin): absent, missing, away, away from, distant, gone, gone away

Definitions

Step	Language	Word	Meaning
1	Latin	absum	I am away, I am absent, I am distant
2	Latin	ab-	from, away, away from; off; at a distance
3	Latin	āb	from, away from, out of
4	Proto-Germanic	*ab	—
5	Proto-Indo-European	apó	—