1. (a.) Long-established; habitual; chronic, as an inveterate liar\.

2. (a.) Firmly established by long continuance; obstinate; deep-rooted; of long standing; as, an inveterate disease; an inveterate abuse.

3. (a.) Having habits fixed by long continuance; confirmed; habitual; as, an inveterate idler or smoker.

4. (a.) Malignant; virulent; spiteful.

5. (v. t.) To fix and settle by long continuance.

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