Latin word obsideo comes from Latin assidere, Latin ob- (Towards; against.)

Detailed word origin of obsideo

Dictionary entry	Language	Definition
assidere	Latin (lat)
ob-	Latin (lat)	Towards; against.
obsideo	Latin (lat)	(transitive) I detain, hold captive. (transitive, military) I besiege; hem in, beset (a city).. I frequent, haunt, inhabit.. I occupy, fill, possess.. I sit, remain, abide, stay.. I watch closely; I am on the lookout for.

Words with the same origin as obsideo