adjective
confluent
KAHN-floo-unt/kɑnflˈuʌnt/
Flowing or merging together into a continuous whole.
The confluent streams join to form one wider channel of water.

Etymology
The pieces describe things actively “flowing together,” as streams meet in their courses. The adjective carries that image into the broader description of things merging into one.
In context
… so that in the tail the confluent measureless force of the whole whale seems concentrated to a point.
More examples
- The streams become confluent at the edge of the valley.
- She paints confluent bands of color with a wet brush.
- Small spots grow into a single confluent patch.
Forms
confluent
confluence noun — A flowing or merging together.
Similar words
- merging
- Emphasizes the process of joining rather than the continuous result.
- continuous
- Emphasizes an unbroken whole rather than separate parts joining.