It keeps emptying water out. The mouth of the river doens't change shape or anything. It just is the part of the river when the river empties into a lake or ocean, etc.
The mouth of a river is where it empties into another river, a lake, a sea, or an ocean.
mouth of the river
The part of a river that empties into a body of water is called the mouth of the river
A river - the "river-mouth" is where it empties into the sea or a lake.
the Amazon empties in the Atlantic Ocean
That's the river mouth - or 'delta'.
Mouth
the Amazon empties in the Atlantic ocean
That is the mouth of the river.
It is usually referred to as the mouth of the river.
At the point the river empties into a lake or ocean.
Any river. The place where the river empties into the sea or lake is called the "mouth" of the river.