The most ridiculous character in Pay Any Price may be Dennis Montgomery, who is described as an inveterate gambler and swindler.
As an inveterate art-fair visitor, I have become obsessed by what kind of footwear to bring.
An inveterate networker, he managed to get Tennessee Williams as the chief signatory on one letter-writing campaign.
inveterate in·vet·er·ate (ĭn-vět'ər-ĭt)
Firmly and long established; deep-rooted.
Persisting in an ingrained habit; habitual.