abrasion
n.
1650s, from Medieval Latin abrasionem (nominative abrasio) "a scraping," noun of action from past participle stem of Latin abradere "to scrape away, shave off," from ab- "off" (see ab-) + radere "to scrape" (see raze).
〔李〕[ab-;ras;-ionn.] n.擦掉； 磨损； 磨损处； 磨蚀 ←rad, ras (L radere, rasum)=to scrape 擦刮
〔蒋〕[ras，rad擦，刮，-ion名词后缀] 擦掉，磨损，擦伤处