 Some linguists trace erosion to the speaker's tendency to follow the principle of least effort, while others think that erosion is a sign of changes taking place.However, phonetic erosion, a common process of language change that can take place with no connection to grammaticalization, is not a necessary property of grammaticalization.For example, the Latin construction of the type "clarā mente", meaning 'with a clear mind' is the source of modern Romance productive adverb formation, as in Italian "chiaramente", Spanish "claramente" 'clearly'.