Latin word absum comes from Latin fui, Latin ab-

Detailed word origin of absum

Dictionary entry	Language	Definition
fui	Latin (lat)
ab-	Latin (lat)	Absence of. At a distance. Completely, thoroughly. From, away, away from. More remote. Off.
absum	Latin (lat)	I am away, I am absent, I am distant.

Words with the same origin as absum