irretrievably

from WordNet (r) 3.0 (2006)

irretrievably
    adv 1: in an irretrievable manner; "it is irretrievably lost"

from The Collaborative International Dictionary of English v.0.48

Irretrievably \Ir`re*triev"a*bly\, adv.
   In an irretrievable manner.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

19 Moby Thesaurus words for "irretrievably":
      absolutely, clean, irreclaimably, irrecoverably, irredeemably,
      irremediably, irreparably, irreversibly, irrevocably, perfectly,
      plain, plumb, quite, right, sheer, stark, unrelievedly, unsalvably,
      unsalvageably

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