Italian word possedere comes from Latin sedeo, Latin potis (Able, capable, possible.)

Detailed word origin of possedere

Dictionary entry	Language	Definition
sedeo	Latin (lat)	I hold or hang fast or firm; I am established. I keep the field, remain encamped. I settle or sink down, subside. I sit in an official seat; sit in council or court, hold court, preside. I sit still; remain, tarry, stay, abide, linger, loiter; sit around. I sit, I am seated.
potis	Latin (lat)	Able, capable, possible.
possessum	Latin (lat)
possedere	Italian (ita)	(transitive) to master (a subject, a language, etc.). (transitive) to possess, have, own.

Words with the same origin as possedere