磨损

磨损	mó sǔn	to suffer wear and tear; to deteriorate through use; to wear out
磨	mó	to rub / to grind / to polish / to sharpen / to wear down / to die out / to waste time / to pester / to insist
磨	mò	grindstone / to grind / to turn round
损	sǔn	(bound form) to decrease; to diminish / (bound form) to harm; to damage / (coll.) to ridicule; to deride / (coll.) mean; nasty; sarcastic