IPA: /ˈʃɪpˌmɑːstər/
KK: /ˈʃɪpˌmæs.tɚ/
A person who is in charge of a ship and responsible for its operation and crew.
The shipmaster navigated the vessel through the stormy seas.
Shipmaster → It is formed from "ship" (from Old English *scip*, meaning a vessel for traveling on water) and "master" (from Old English *maegester*, meaning one who has control or authority). The word "shipmaster" refers to a person who has authority over a ship, typically the captain.
Think of a 'vessel for traveling on water' ('ship') and someone who has 'control' ('master') over it — that's why a shipmaster is the captain of a ship.