immemorial

dating or surviving from the distant past the immemorial Alps, where once Hannibal's army marched Synonyms aged, age-old, antediluvian, antique, dateless, hoar, hoary, ancient, old, venerableRelated Words aging (or ageing), mature; antiquated, archaic, archaistic, dated, fusty, geriatric, medieval (also mediaeval), moldy, Noachian, obsolete, outmoded, out-of-date, passé; old-fashioned, old-time, old-world, retro, vintage; durable, enduring, lasting, long-lived, permanent; ageless, hallowed, time-honored, timeless, time-tested, timeworn, traditional, tried, tried-and-true; classic, classical; prehistoric (also prehistorical), primeval, primordialNear Antonyms fresh, vernal, young, youthful; contemporary, current, latest, mod, novel, present-day, ultramodern; untested, untried; brand-new, unused, unwornAntonyms modern, new, recent