grumbling

Reading level: hard

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun a loud low dull continuous noise
  2. noun a complaint uttered in a low and indistinct tone
  3. verb show one's unhappiness or critical attitude

In classic literature

Synonyms

rumble, rumbling, grumble

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