wear(sth)away
—phrasal verbwithwearverbuk/weər/us/wer/wore|worn
tobecomethinanddisappearafterrepeateduse orrubbing, or tocausesomething tobecomethinanddisappearin this way
（使）磨损，磨掉
In somediseases, theprotectivelayerin ajointwearsaway.患某些疾病时，关节处的保护层会受到磨损。