griz ‧ zle /ˈɡrɪz ə l/ BrE AmE verb [intransitive] British English informal
[ Date: 1700-1800 ; Origin: Perhaps from Grizel , a form of the name Griselda ; 'patient Griselda' was a well-known name for an obedient wife ]
1 . if a baby or child grizzles, they cry quietly for a long time
2 . to complain in an annoying way SYN moan :
Ben was grizzling about being tired.