cask (n.)youdaoicibaDictgodict[cask 词源字典]
mid-15c., from Middle French casque "cask; helmet," from Spanish casco "skull, cask, helmet," originally "potsherd," from cascar "to break up," from Vulgar Latin *quassicare, frequentative of Latin quassare "to shake, shatter" (see quash). The sense evolution is unclear.[cask etymology, cask origin, 英语词源]