abrasion (n.) Look up abrasion at Dictionary.com
1650s, "act of abrading," 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," possibly from an extended form of PIE root *red- "to scrape, scratch, gnaw." From 1740 as "result of abrasion."