Catalan word demostrar comes from Latin de- (De-.), Latin monstro, Latin monstrare

Detailed word origin of demostrar

Dictionary entry	Language	Definition
de-	Latin (lat)	De-.
monstro	Latin (lat)	I advise, teach. I appoint, ordain.. I denounce, indict.. I show, point out, indicate.
monstrare	Latin (lat)
demonstro	Latin (lat)	I draw attention to. I point out. I show, demonstrate, prove.
demostrar	Catalan (cat)	To show; to demonstrate.

Words with the same origin as demostrar