unmistakably

from WordNet (r) 3.0 (2006)

unmistakably
    adv 1: without possibility of mistake; "this watercolor is
           unmistakably a synthesis of nature"
    2: in a signal manner; "signally inappropriate methods" [syn:
       {signally}, {unmistakably}, {remarkably}]

from The Collaborative International Dictionary of English v.0.48

Unmistakable \Un`mis*tak"a*ble\, a.
   Incapable of being mistaken or misunderstood; clear; plain;
   obvious; evident. -- {Un`mis*tak"a*bly}, adv.
   [1913 Webster] Unmiter

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