- 1. n a loud low dull continuous noise n a complaint uttered in a low and indistinct tone v show one's unhappiness or critical attitude v make complaining remarks or noises under one's breath v to utter or emit low dull rumbling sounds v make a low noise Source: ecdict
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grumbles
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lowdullnoiseattitudebreathcomplainingcomplaintcontinuouscriticalemitindistinctloudnoisesremarksrumblingshowsoundstoneunhappinessutteruttered