noun

tributary

tributary, branch, feeder

The River Lea is a tributary of the River Thames.

The River Lea is a tributary of the River Thames.

The smaller kingdom was a tributary of the great empire.

The smaller kingdom was a tributary of the great empire.

a tributary of ((a river/empire)) a smaller river flowing into a larger one The River Lea is a tributary of the River Thames.

Synonyms: branch, feeder (for a river); vassal (for a state)

From Latin 'tributarius' (paying tribute), from 'tributum' (tribute).

A 'tributary' river 'pays tribute' by flowing into a larger river, just as a tributary state pays tribute to an empire.

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