Inveterate

Adjective

 * 1)  Having habits fixed by long continuance; confirmed; habitual; as, an inveterate idler or smoker.
 * 2) Malignant; virulent; spiteful.
 * 3) Old; firmly established by long continuance; of long standing; obstinately deep-rooted; as, an inveterate disease; an inveterate habit.

Verb

 * 1)  To fix and settle by long continuance; to entrench.

Thesaurus
abiding, accustomed, acknowledged, addicted, admitted, age-long, aged, ancient, antique, chronic, confirmed, constant, continuing, conventional, customary, deep-dyed, deep-engraven, deep-fixed, deep-grounded, deep-laid, deep-rooted, deep-seated, deep-set, deep-settled, diuturnal, durable, dyed-in-the-wool, embedded, embossed, enduring, engrafted, engraved, entrenched, established, etched, evergreen, fast, firmly established, fixed, folk, graven, habitual, habituated, hallowed, handed down, hardened, hardy, heroic, hoary, immemorial, immutable, implanted, impressed, imprinted, inbred, incorrigible, inculcated, indelibly impressed, indurated, infixed, ingrained, ingrown, innate, instilled, intransient, inwrought, irreversible, lasting, legendary, lifelong, long-established, long-lasting, long-lived, long-standing, long-term, longeval, longevous, macrobiotic, mythological, of long duration, of long standing, of the folk, old, old-line, on a rock, on bedrock, oral, perdurable, perduring, perennial, permanent, perpetual, persistent, persisting, prescriptive, received, recognized, remaining, rooted, sempervirent, set, settled, settled in habit, stabilized, stable, staying, steadfast, sworn, thorough, time-honored, tough, traditional, tried and true, true-blue, understood, unfading, unwritten, usual, venerable, vested, vital, well-established, well-founded, well-grounded, well-set, well-settled, worshipful

Etymology
From inveteratus:, form of inveterare:, from in-: + veterare:, from vetus:, form of veteris:; latter ancestor to veteran:.

Cognate to Italian inveterato:.

Antonyms

 * casual

Derived terms

 * inveteration

Adjective

 * Italian: malevolo


 * Portuguese:

Adjective
inveterate


 * 1) Feminine plural form of inveterato

Anagrams

 * eternatevi
 * ritenevate