SYNONYMS
established, long-established, long-standing, firm, committed, dyed-in-the-wool, through and through
seasoned, hardened, settled, set, fixed, rooted
staunch, loyal, faithful, devoted, dedicated, stalwart, steadfast
habitual, compulsive, obsessive, persistent, unapologetic, unashamed, incorrigible, irredeemable, unreformable, impenitent, inveterate, chronic, incurable
informal deep-dyed, card-carrying