sourly

from WordNet (r) 3.0 (2006)
sourly
    adv 1: in a sour manner; "he complained sourly that the new
           rules only benefitted the managers"
    
from The Collaborative International Dictionary of English v.0.48
Sourly \Sour"ly\, adv.
   In a sour manner; with sourness.
   [1913 Webster]
    

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