tributary
1. trib.u.tary \'trib-y*-.ter-e-\ aj 1: paying tribute to another to acknowledge submission, to obtain protecti on, or to purchase peace : SUBJECT 2: paid or owed as tribute 3: channeling supplies into something more inclusive : CONTRIBUTORYM 2. tributary n 1: a ruler or state that pays tribute to a conqueror 2: a stream feeding a larger stream or a lake