An inexhaustible resource is a natural resource that will never run out. Examples: wind, geothermal energy, and solar energy. Water is not an inexhaustible resource, it is a renewable resource. We are starting to deplete our water resource by polluting it.
The difference between a renewable and a inexhaustible resource is that a renewable resource can be used or recreated again but inexhaustible resources can not be recreated because they are always available for everyone to use. Remember that it must also be resource.
Oil, the fossil fuel, is a non-renewable resource on human time scales. Vegetable oil is a renewable resource. An inexhaustible resource would be sunlight and a renewable resource would be wind energy and solar energy.