sounds like opulent means rich wealthy. rich people generally fat too.
we can remember it by 'crop'. One who eats too much crop is very fat..
corp (corpse = body) + plent (plenty) = plenty of body ie., fat
CORPULENT and CORPUS are from same word-body
Corpulent - Cop - A policeman - Cops are generally fat
sounds like“CAR+PULL+LENT” car pull or lend it--only then you can be less fatty. You are always in car sitting.
Corpus is Opulent