grumble

verb
1
to complain about somebody/something, especially something that is not really very serious
غر زدن, غرغر کردن
2
to make a deep continuous sound
غرغر کردن
Thunder grumbled in the distance.
synonym rumble
noun
1
something that you complain about because you are not satisfied
شکایت, نارضایتی
2
a long low sound
صدای غرغر, غرولند
a distant grumble of thunder
synonym rumble