inveterate

If you're an inveterate doodler, all your notebooks are covered with drawings. If you're an inveterate golf player, you probably get twitchy if you haven't been out on a course in a week.

In Middle English inveterate was associated with chronic disease. Now it simply refers to something that is a signature habit with a person. Unless you're an inveterate gambler, drinker or smoker––in which case you're addicted and we're back to talking about being sick.

Definitions of inveterate
1

adj habitual

Synonyms:
chronic
usual
occurring or encountered or experienced or observed frequently or in accordance with regular practice or procedure

adv in a habitual and longstanding manner

Synonyms:
chronically

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