parapet (n.)youdaoicibaDictYouDict[parapet 词源字典]
1580s, from Middle French parapet "breastwork" (16c.), or directly from Italian parapetto, from para- "defense" (see para- (2)) + petto "breast," from Latin pectus (see pectoral (adj.)).[parapet etymology, parapet origin, 英语词源]