The term 'become worn' can be described by the crossword solutions 'ERODE, ' 'FRAY, ' and 'eroded.' ERODE is a verb meaning to gradually wear away or diminish, usually due to the action of natural elements such as wind or water. FRAY is a verb meaning to become worn or tattered at the edges, often due to age or use. Finally, ERODE is a past tense verb meaning to have been worn away or diminished. Together, these words describe the process of something becoming worn over time.