
Inveterate
Deeply Rooted
It implies a habit that's ingrained and hard to change because it's been done for a long time.
She is an inveterate reader of mystery novels.
Negative Implication
Often used for bad habits or negative traits, suggesting they're a part of the person's nature.
His inveterate laziness has cost him several jobs.
Often Personal
Typically refers to individual habits rather than groups or organizations.
Despite the new law, he remains an inveterate jaywalker.