Wordnet 3.0
ADVERB (1)
1.
in an irretrievable manner;
- Example: "it is irretrievably lost"
The Collaborative International Dictionary of English v.0.48:
Irretrievably \Ir`re*triev"a*bly\, adv.
In an irretrievable manner.
[1913 Webster]
WordNet (r) 3.0 (2006):
irretrievably
adv 1: in an irretrievable manner; "it is irretrievably lost"
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