Where freshwater mixes with seawater, and the river usually widens out, is the river estuary.
the meander
The mouth part of a river is called a delta. It is the large silty area at the mouth of a river at which the river spills into different slow flowing channels.
River mouth and your mouth, Isn't it?
The mouth, where the river ends.
A river - the "river-mouth" is where it empties into the sea or a lake.
a river mouth
Tributary. The Missouri river is a tributary of the Mississippi river.
Your mouth is, in fact, part of the respiratory system. It's also part of the digestive system.
dealter is the mouth
The mouth is the part of a river of stream where it meats a sea or ocean.
I believe it is the mouth of the river. The mouth of the Mississippi River dumps into the Gulf Of Mexico
That is the mouth of the river.
the part of a river where its water flow into another body of water.ADDED:The junction of two rivers is their Confluence. The mouth of a river is its Estuary.