portal (n.)youdaoicibaDictYouDict[portal 词源字典]
late 14c., "gate, gateway," from Old French portal "gate" (Modern French portail) and directly from Medieval Latin portale "city gate, porch," from neuter of portalis (adj.) "of a gate," from Latin porta "gate" (see port (n.1)).[portal etymology, portal origin, 英语词源]