passport (n.)youdaoicibaDictYouDict[passport 词源字典]
c. 1500, from Middle French passeport "authorization to pass through a port" to enter or leave a country (15c.), from passe, imperative of Old French passer "to pass" (see pass (v.)) + port "port" (see port (n.1)).[passport etymology, passport origin, 英语词源]