senescent

being of advanced years and especially past middle age symptoms most often seen in senescent people Synonyms aged, aging (or ageing), ancient, geriatric, long-lived, old, older, over-the-hill, elderly, 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