IPA: /ˈfjuːlər/
KK: /ˈfjuːlər/
A person or thing that provides fuel for engines, vehicles, or machines.
The fueler filled the airplane's tank before takeoff.
Fueler → The word is formed from "fuel" (from Old French *fouaille*, meaning to feed or supply) and "-er" (meaning a person who). A fueler is a person who supplies or feeds fuel.
Think of someone who 'supplies' ('fuel') energy or power — that's what a fueler does.