cor·sair
noun/kɔːˈseə(r)/
/kɔːrˈser/
(old use)- a pirate
海盗 - a privately owned merchantman that had the job of fighting in a war
（过去的）武装商船，私掠船
Word Originmid 16th cent.: from French corsaire, from medieval Latin cursarius, from cursus ‘a raid, plunder’, special use of Latin cursus ‘course’, from currere ‘to run’.