Parabellum (n.)youdaoicibaDictYouDict[Parabellum 词源字典]
proprietary name for a type of automatic firearm, 1904 (Mauser & Deutsche Waffen und Munitionsfabriken), from Latin phrase si vis pacem, para bellum, from para, imperative of parare "to prepare" (see para- (2)) + bellum "war" (see bellicose).[Parabellum etymology, Parabellum origin, 英语词源]