Wiktionary
wearing out
vb. (present participle of wear out English)
Usage examples of "wearing out".
On the other hand, the balloon was visibly wearing out, and the doctor felt it failing him.
Knowing nothing of machinery, it did not occur to him that the repellent power had failed through the wearing out of its hidden generators.
It was just a matter of getting people out on the street, rattling doorknobs and wearing out shoes, until you got what you needed.
Hiring sorcerers was always expensive, and of the few spells that remained to Jordan, most were slowly wearing out.