Circular source

Circular source is a term used to describe something that continues to give out something. It can be something tangible, like food or water, but it can also be something intangible, like energy or knowledge. A circle is a shape that never ends so it can be used to represent something that continues to give out what it has. An example of a circular source would be a river. The river is constantly getting new water as it flows and it never runs out. It's a source of water that can be used by everyone.