inveterate

Synonyms: abiding accustomed addicted chronic confirmed continuing customary deep-rooted deep-seated dyed-in-the-wool enduring entrenched fixed habitual habituated hardcore hardened inbred incorrigible incurable indurated ineradicable ingrained innate lifelong long-lasting long-lived obstinate old perennial permanent persistent persisting set settled stubborn sworn usual

Antonyms: short-lived