to wear out: to become old and worn through use, or to use something up.
At its core this word is about the slow damage that time and use do to a thing. Clothes fray, sandals give out, a body ages, and even the sky and land, the poets say, will one day wear thin like an old coat. The same picture covers all of it: something once fresh is gradually used up.
The word works two ways. Most often it describes something wearing out on its own: garments, bones, the heavens and the earth. But it can also be done to something, as when grief "wears out" a person's body or the grave consumes what is left of the dead.
One turn is worth watching, because it runs the opposite direction. In a promise of restored life, God's people will "wear out" the work of their own hands, meaning they will live long enough to use it fully and enjoy every bit of it. The same verb that pictures decay here pictures a life so long and settled that nothing is wasted.
The most striking use sets the wearing out of creation against the God who does not wear out. The heavens and the earth will grow old like a garment, but the One who made them stays the same. A related word for growing old in years is זָקֵן, and a companion image of decay is רָקָב, "to rot," which stands right beside this verb when Job pictures his own body falling apart.