IPA: /ˈhɛviˌsɛt/
KK: /ˈhɛviˌsɛt/
Describing a person who has a solid and stocky body shape, often with a broad frame.
The heavyset man walked confidently into the room, drawing everyone's attention.
Heavyset is formed from "heavy" (from Old English "hefig", meaning having great weight) and "set" (from Old English "settan", meaning to place or put). The word describes a person who is placed or characterized by being heavy or stout.
Think of someone who is 'placed' ('set') as 'heavy' — that's why heavyset describes a stout or solidly built person.