Passport
late 15th century (denoting authorization to depart from a port): from French passeport, from passer ‘to pass’ + port ‘seaport’.
wiktionary
From French passeport, from passer(“pass”) + port(“port”). Compare portpass. Equivalent to pass + port.
etymonline
passport (n.)
c. 1500, passe-porte, "authorization to travel through a country," from Old French passeport "authorization to pass through a port" to enter or leave a country (15c.), from passe, imperative of passer "to pass" (see pass (v.)) + port "port" (see port (n.1)). The original sense is obsolete; the meaning "document issued by competent civil authority granting permission to the person named in it to travel in or out of a country or authenticating his right to protection while abroad" is from 1540s. In early use often indicating principally the right to leave one's country.
