The situation that occurs when a trademarked name becomes a generic name through constant use.

relatively even erosion of a layer of soil without channel formation; generally takes place on sloping land

soil erosion occurring at a rate much faster than soil horizons can be formed from the parent regolith.

plural of trademark erosion

erosion of soft ground caused by drainage of rain.

(phonetics, phonology) The loss of phonemes from a spoken word (or of words in a phrase) over time, sometimes as a result of grammaticalization.