abiding accepted accustomed age-long aged ancient antique confirmed constant continuing customary deep-dyed deep-fixed deep-rooted deep-seated deep-set deep-settled diuturnal durable dyed-in-the-wool enduring established evergreen fast fixed habitual habituated hardened hardy immutable implanted incorrigible inculcated infixed ingrained instilled intransient inveterate irreversible lasting lingering long-established long-lasting long-lived long-standing long-term longeval longevous macrobiotic of long duration of long standing perdurable perduring perennial permanent perpetual persistent persisting remaining rooted routine sempervirent set settled settled in habit stable staying steadfast thorough tough unfading vital wonted