IPA: /ˈsuːpərˌkɑːrɡoʊ/
KK: /ˈsuːpərˌkɑːrɡoʊ/
A person on a merchant ship responsible for managing the cargo and handling its sale and purchase during the voyage.
The supercargo ensured that all the goods were properly loaded and documented before departure.
Supercargo is formed from "super-" (meaning over or above) and "cargo" (from Latin "carricare", meaning to load). The term refers to a person who oversees the cargo on a ship, thus someone who is above or in charge of the cargo.
Think of someone who is 'overseeing' ('super-') the 'load' ('cargo') on a ship — that's what a supercargo does.