IPA: /ˈbruːˌmɑːstər/
KK: /ˈbruːˌmæstər/
A person who is responsible for making beer, especially the main person in charge at a brewery.
The brewmaster created a new recipe for a refreshing summer ale.
Brewmaster → It is formed from "brew" (from Old English *brēowan*, meaning to prepare or make) and "master" (from Old English *mægester*, meaning one who has control or authority). A brewmaster is someone who has authority or expertise in the preparation of brewing.
Think of someone who 'prepares' ('brew') beverages and has 'control' ('master') over the brewing process — that's what a brewmaster does.