ELI5: Explain Like I'm 5

Wear

Wear is what happens when something rubs against something else repeatedly. For example, when you walk in your shoes, the bottoms of them rub against the ground over and over, and over time, this makes them worn out. Wear can also happen to clothes if you wear them a lot, use them constantly, and don't wash them often, which causes them to get holes and holes in them.