grumbling (n.)

  1. a loud low dull continuous noise; they heard the rumbling of thunder

    [ Syn: rumble , rumbling , grumble ]

  2. a complaint uttered in a low and indistinct tone

    [ Syn: grumble , murmur , murmuring , mutter , muttering ]

    grumbling (adj.)

  1. continuous full and low-pitched throbbing sound; the rumbling rolling sound of thunder

    [ Syn: rumbling ]

The dictionary is based on the WordNet Electronic Lexical Database.
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