: a stream flowing into a larger stream or a lake The river has several tributaries.

What is the origin of the word tributary?

The noun tributary is related to the word tribute and both come from the Latin word tributum, meaning “a thing contributed or paid.” Long ago, a tributary was someone who was forced to pay a person or group in return for protection — namely from those who received the tribute.

How can you explain tributaries?

A tributary or affluent is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean.