IPA: /ˈɡæz.mən/
KK: /ˈɡæsmən/
A person who works for a gas company, often visiting homes or businesses to check gas meters, install, or repair gas appliances.
The gasman came to check the meter and ensure everything was working properly.
Gasman → The word is formed from "gas" (from Dutch "gas", meaning vapor or air) and "man" (from Old English "mann", meaning person). A gasman is a person who works with or handles gas.
Think of a 'person' ('man') who works with 'vapor' or 'air' ('gas') — that's what a gasman does.