inveterate

Firmly and long established; deep-rooted.

Persisting in an ingrained habit; habitual: synonym: chronic.

To make inveterate; render chronic; establish by force of habit.

Old; long established.

Firmly established by long continuance; deep-rooted; obstinate: generally, though not always, in a derogatory sense: as, an inveterate disease; an inveterate enemy.

Confirmed in any habit; having habits fixed by long continuance: applied to persons: as, an inveterate smoker.

Malignant; virulent; showing obstinate prejudice.

Synonyms Deep-seated, chronic.

Habitual, hardened.

Old; long-established.