Definition
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noun : GRUMBLING
Source:WordNet 3.1
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1. (
) a loud low dull continuous noise; "they heard the rumbling of thunder" ;
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2. (
) a complaint uttered in a low and indistinct tone ;
verb : GRUMBLING
Source:WordNet 3.1
Adjective : GRUMBLING
Source:WordNet 3.1
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1. (
) continuous full and low-pitched throbbing sound; "the rumbling rolling sound of thunder" ;
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