to grumble
verb/ʁɨʒ.mũˈɡaɾ/medium
res·mun·gar
Definition
To speak in a low, indistinct voice, usually to express discontent, complaint, or bad mood.
Grandfather tends to grumble when the weather is cloudy.
She grumbled something about the food but ended up eating it.
Common collocations
to grumble about everythingto grumble under one's breathto grumble againstto go around grumbling
Etymology
Possivelmente de origem expressiva ou onomatopeica.