Synonyms of 'grizzle'
whineDictionary, fret, whimper
The children were grizzling and complaining.
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If someone is snivelling, they are crying or sniffing in a way that irritates you.
a snivelling child
If someone whimpers, they make quiet unhappy or frightened sounds, as if they are about to start crying.
She lay at the bottom of the stairs, whimpering in pain.
If you say that someone is whingeing, you mean that they are complaining in an annoying way about something unimportant.
people who whinge about their alleged misfortunes
Thesaurus for grizzle from the Collins English Thesaurus
to make or become grey