Incapable of being recovered or regained.

synonym: unrecoverable.

Roget 122: past, gone, gone by, over, passed away, bygone, foregone; elapsed, lapsed, preterlapsed^†, expired, no more, run out, blown over, has-been, that has been, extinct, antediluvian, antebellum, never to return, gone with the wind, exploded, forgotten, irrecoverable; obsolete etc. (old) 124.    former, pristine, quondam, ci-devant [Fr.], late; ancestral.    foregoing; last, latter; recent, over night; preterperfect^†, preterpluperfect^†.    looking back etc. v.; retrospective, retroactive; archaeological etc. n.. ... show more

Roget 859: hopeless, desperate, despairing, gone, in despair, au desespoir [Fr.], forlorn, desolate; inconsolable etc. (dejected) 837; broken hearted.    unpromising, unpropitious; inauspicious, ill-omened, threatening, clouded over.    out of the question, not to be thought of; impracticable etc. 471; past hope, past cure, past mending, past recall; at one's last gasp etc. (death) 360; given up, given over.    incurable, cureless, immedicable, remediless, beyond remedy; incorrigible; irreparable, irremediable, irrecoverable, irreversible, irretrievable, irreclaimable, irredeemable, irrevocable; ruined, undone; immitigable.    ... show more

Dutch: onherstelbaar, oninbaar