Portuguese (n.)youdaoicibaDictYouDict[Portuguese 词源字典]
1610s, the language, or a resident, of Portugal; 1660s as an adjective, from Portuguese Portuguez (see Portugal + -ese). The ending was vulgarly mistaken for a plural in English, and false singular Portugee (1830) was formed (compare Chinee from Chinese). For Portuguese man-of-war, see man-of-war.[Portuguese etymology, Portuguese origin, 英语词源]