Ancient
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fresh, inexperienced, higher, up-to-date, high, Evolved, immature, modern, recent, untried, young, present, new, future, full-scale, underage, current, advanced, preteen, childlike, puerile, infantile, modish, ageless, babyish, untested, Infantine, kiddish, juvenile, minor, callow, full-blown, raw, novel, unworn, developed, fashionable, childish, unused, complex, full-fledged, green, late, vernal, latest, brand-new, stylish, contemporary.