Dutch word beheersen comes from Dutch be-, Dutch heersen (To prevail. To rule.)

Detailed word origin of beheersen

Dictionary entry	Language	Definition
be-	Dutch (nld)	Used to indicate that a verb is acting on a direct object (making the verb transitive). Always unstressed.
heersen	Dutch (nld)	To prevail. To rule.
beheersen	Dutch (nld)	(transitive) to control, to master.

Words with the same origin as beheersen