Erosion (noun)

1. The gradual destruction or diminution of something.
2. The wearing away of land, rocks, etc., by the action of water, wind, or ice.

Origin:

Late middle english: via old french from latin erosio(n-), from erodere "gnaw away", from e- (variant of ex-) "out" + rodere "gnaw".

Examples:

1. Erosion of the shoreline is a natural process that occurs over time.
2. Wind erosion is a serious problem in the Great Plains.
3. The erosion of the cliff face was a result of heavy rainfall.
4. The island was formed due to the erosion of volcanic ash.
5. Soil erosion is a major concern for farmers in the area.