tributary

Refers to a large and important tributary.

Refers to the primary or most significant tributary of a river.

A small, narrow river that flows into a larger one.

A smaller river that flows into a larger one.

The tributary moves steadily into a larger body of water.

The tributary flows and empties into a larger body of water.

The tributary supplies water to a larger river or lake.

The tributary carries water away from a specific area (e.g., a valley).