Grumbling
/ɡrˈʌmbəlɪŋ/
Listen pronunciation
Definition
(verb) present participle and gerund of grumble
Sentence Examples
Stop your grumbling and get the work out of the way.
My grandfather was always grumbling about something or other.
CEFR Practice Quiz
We could hear the distant ____ of thunder as the dark storm clouds slowly rolled across the valley.