IPA: /ˈkaʊntərˌmæn/
KK: /ˈkaʊntərˌmæn/
A person, usually a man, who works at a counter, often serving customers in places like diners or shops.
The counterman took my order and prepared my meal quickly.
Counterman → It is formed from "counter" (from Old French *countrer*, meaning to oppose or act against) and "man" (meaning a person). The word refers to a person who counters or opposes, often in a commercial context, such as a salesperson or clerk who serves customers at a counter.
Think of someone who 'opposes' or 'acts against' ('counter') while being a 'person' ('man') — that's why a counterman is someone who serves at a counter.