corsair
noun [ C ] uk/ˈkɔː.seər/ us/ˈkɔːr.ser/
（尤指16至18世纪在南地中海一带收受政府金钱袭击敌军船只的）海盗
a pirate (= person who sails in a ship and attacks other ships in order to steal from them), especially one given permission by a government to attack enemy ships in the 16th - 18th centuries in the southern Mediterranean