IPA: /ˈfaɪərˌmæn/
KK: /ˈfaɪərˌmæn/
A person whose job is to put out fires and help people in emergencies.
The fireman quickly arrived at the scene to extinguish the flames.
Fireman → It is formed from "fire" (from Old English "fyr", meaning flame or combustion) and "man" (from Old English "mann", meaning person). A fireman is a person who deals with fire, typically in the context of firefighting.
Think of a 'person' ('man') who works with 'flame' ('fire') — that's why a fireman is someone who fights fires.