long–lived

1 being of advanced years and especially past middle age that sequoia tree is especially long-lived, having reached an age generally estimated to be at least 3,000 years Synonyms aged, aging (or ageing), ancient, geriatric, long-lived, old, older, over-the-hill, senescent, senior, unyoungRelated Words centenarian, nonagenarian, octogenarian, septuagenarian, sexagenarian; oldish; adult, grown-up, mature, middle-aged; pensioned, retired, superannuated; matriarchal, patriarchal, venerable; anile, decrepit, doddering, senile, spavined, tottery; overage (also overaged)Near Antonyms ageless; youngish; adolescent, immature, juvenile, preteen, puerile; minor, underage; callow, green, inexperienced, raw; babyish, childish, childlike, infantile, infantine, kiddishAntonyms young, youthful

2 lasting for a considerable time much to the relief of his parents, the youth's interest in the piano proved to be long-lived Synonyms extended, far, great, lengthy, long-drawn-out (or long-drawn), long-lived, long-termRelated Words aeonian (or aeonic), endless, everlasting, interminable, persistent; longish, overlong, prolonged, protracted; permanent; all-day, all-night; multiday, multiyearNear Antonyms abrupt, sudden; abbreviated, condensed, curtailed, shortened; ephemeral, fleeting, momentary, transient, transitory; impermanent; short-rangeAntonyms brief, little, mini, short, shortish, short-lived, short-term