"Become worn away" is a phrase that refers to the gradual erosion or damage of a surface or material due to prolonged use, exposure to the elements, or other factors. There are many synonyms that can be used to describe this process, including "wear down," "erode," "corrode," "deteriorate," "decay," "crumble," "weather," and "fade." Each of these terms carries a slightly different connotation, and may be more appropriate in different contexts. However, all of these words suggest a slow and gradual process of deterioration that occurs over time and can lead to significant changes in the appearance and functionality of an object or surface.