Definition Of grumble
the main grumble is that he spends too much time away
complain or protest about something in a bad-tempered but typically muted way.
his father was grumbling that he hadn't heard a word from him
Example Of grumble
"It's not funny, " he grumbled sourly, and I laughed harder.
A little thrill flickers in my body as I see the sky darken to a deep purple over the horizon, and in the distance I hear a small grumble of thunder.
After that I made some sound that sounded like a grumble , but not quite.
After that, my stomach was grumbling and everyone else was groaning about their hunger.
Beyond the rust streaked door we could hear the grumble and whine of machinery.