rumbling
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/ˈrʌmblɪŋ/
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/ˈrʌmblɪŋ/
A continuous, low sound, like distant thunder or a stomach growling.
We heard a rumbling sound from the thunderstorm outside.
Unconfirmed or unofficial information, often about problems or dissatisfaction.
There were rumblings of discontent among the employees about the new policy.