The term 'wears out' can be described by a variety of words, all of which have to do with the idea of using something up or exhausting it. Overuses (8 letters) is when something is used too much, SAPS (4 letters) is when something is drained of energy, exhausts (8 letters) is when something is completely used up, TIRES (5 letters) is when something becomes weary, JADES (5 letters) is when something loses its freshness, and overtires (9 letters) is when something is exhausted from too much effort.