grate: Grate ‘framework for holding burning fuel’ [14] and grate ‘rub’ [15] are different words. The former comes via Old French grate ‘grille’ and Vulgar Latin *grāta from Latin crātis ‘wickerwork, hurdle’. Grate ‘rub’ is ultimately Germanic (its ultimate ancestor was the Germanic verb *krattōn, source of modern German kratzen ‘scratch’), but it reached English via Old French grater ‘scrape’. Gratin [19] comes from the derived French noun gratin. => gratin
