grum‧bling /ˈɡrʌmblɪŋ/
noun1. [uncountable] (
also grumblings [plural]) a complaint about something:
She paid up, with some grumbling. Soon, the grumblings turned to open discontent.2. [uncountable] a low continuous sound:
the grumbling of distant thunder [TahlilGaran] Dictionary of Contemporary English ▲