tributary
//ˈtrɪb.jə.ter.i//
Noun
tributarySingular
tributariesPlural
1
A river or stream that flows into a larger river or lake.
This small river is a tributary of the Amazon.
2
A person or state that pays tribute to another, especially as a sign of dependence or submission.
The small kingdom became a tributary of the powerful empire.
Antonym
Adjective
tributaryCanonical form
1
Paying tribute to another state or ruler; subordinate.
The tributary states were required to send annual gifts to the emperor.
2
(Of a river or stream) flowing into a larger river or lake.
The tributary streams flow into the main river.