sounds like opulent means rich wealthy. rich people generally fat too.
:cor+pulent one who is capable of pulling a car i.e. a large fat man
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
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