supercargo

noun

su·​per·​car·​go ˌsü-pər-ˈkär-(ˌ)gō 

ˈsü-pər-ˌkär-

: an officer on a merchant ship in charge of the commercial concerns of the voyage

Word History

Etymology

Spanish sobrecargo, from sobre- over (from Latin super-) + cargo cargo

First Known Use

1667, in the meaning defined above