grumbling — English Dictionary

Noun

1. complaining

   Examples

   the grumblings of a bad-tempered man

   More examples (1)

   For having submitted my ears to Acutilius for several days (and I think you know his style), I should scarcely have regarded it as a hardship to write you a letter describing his grumblings after patiently enduring the bore (and it was rather a bore, I can tell you) of hearing them.

   The commissions paid on this transaction were high and gave rise to grumblings in Great Britain about a “banker's ramp.”

2. rumbling

Adjective

1. continuous full and low-pitched throbbing sound

   Synonyms

   rumbling

   Examples

   the rumbling rolling sound of thunder

Noun

1. a loud low dull continuous noise

   Synonyms

   rumblerumblinggrumble

   Broader terms

   noise

   Examples

   they heard the rumbling of thunder

2. a complaint uttered in a low and indistinct tone

   Synonyms

   grumblemurmurmurmuringmuttermuttering

   Broader terms

   complaint