From Longman Dictionary of Contemporary Englishgrizzlegriz‧zle /ˈɡrɪzəl/ verb [intransitive] British English informal  1 CRYif a baby or child grizzles, they cry quietly for a long time2 COMPLAINto complain in an annoying way SYN moan Ben was grizzling about being tired.→ See Verb tableOrigin grizzle (1700-1800) Perhaps from Grizel, a form of the name Griselda; “patient Griselda” was a well-known name for an obedient wife 
                                                    
                                                
