资料来源 : Webster's Revised Unabridged Dictionary (1913)

Unblushing \Un*blush"ing\, a.
   Not blushing; shameless. -- {Un*blush"ing*ly}, adv.

资料来源 : WordNet®

unblushingly
     adv : without blushing; "his principal opponent unblushingly
           declared victory before the ballots had been counted"