Tributaries

Part of speech: noun

Definitions

1. Branches of a river or stream that flow into a larger body of water
2. Secondary waterways that contribute their flow to a main river, enhancing the system's overall drainage
3. Streams or rivers that feed into a larger river, playing a critical role in its hydrology and ecology

Etymology: "Tributaries" is the plural of "tributary," a noun for a stream that feeds a larger river. The modern sense is a notable shift from the word's earliest meaning. In Middle English, "tributarie" described someone or something that paid tribute, a payer of dues to a ruler, drawn from Latin "tribūtārius," which itself comes from "tribūtum," meaning "tribute." Tribute in Latin was a payment levied on subjects or conquered peoples, so the original idea is one of obligation: a people or territory that pays something to a more powerful authority. The river sense grew from that picture of payment. A smaller stream that pours its water into a greater river was imagined as contributing to it, much as a subject pays tribute to a sovereign. The concrete geographic meaning was built on the older idea of a subordinate giving over its share to a dominant power.

Synonyms: streams, rivers, inflows, affluents, waterways