unimpeachably

from WordNet (r) 3.0 (2006)
unimpeachably
    adv 1: without question; "Fred Winter is unquestionably the
           jockey to follow"; "they hired unimpeachably first-rate
           faculty members" [syn: {unquestionably}, {unimpeachably}]
    
from The Collaborative International Dictionary of English v.0.48
Unimpeachable \Un`im*peach"a*ble\, a.
   Not impeachable; not to be called in question; exempt from
   liability to accusation; free from stain, guilt, or fault;
   irreproachable; blameless; as, an unimpeachable reputation;
   unimpeachable testimony. --Burke. --
   {Un`im*peach"a*ble*ness}, n. -- {Un`im*peach"a*bly}, adv.
   [1913 Webster]
    

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