DuckCorp

DuckCorp Dico

(RFC 2229 compliant dictionary server)
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Found one definition 

  1.                 From English-Croatian FreeDict Dictionary ver. 0.2.2:
                

    
                
                  
    grumble /ɡɹˈʌmbəl/
gunđanje, gunđati, mrmljati, mumlanje, prigovaranje, prigovarati