atavistic

bygone, erstwhile, former, historic, historical, late, old-world, past

antiquated, archaic, dated, démodé, demoded, fossilized, kaput (also kaputt), medieval (also mediaeval), moribund, mossy, moth-eaten, neolithic, Noachian, obsolete, outdated, outmoded, out-of-date, outworn, passé, prehistoric (also prehistorical), rusty, Stone Age, superannuated

aging (or ageing), obsolescent

discarded, disused, inoperable, unusable, unworkable, useless

dead, defunct, expired, extinct, vanished

dormant, fallow, free, idle, inactive, inert, inoperative, latent

ancient, antediluvian, antique, dateless, fusty, musty, old

oldfangled, old-fashioned, old-time, retro, vintage

aged, age-old, hoary, venerable