Meaning

noun a loud low dull continuous noise

noun a complaint uttered in a low and indistinct tone

verb show one's unhappiness or critical attitude

originProbably from Middle French grommeler, from Old French grumeler (“to murmur, grumble”), from Middle Dutch *grommelen ("to murmur, mutter, grunt"; > Modern Dutch grommelen (“to grumble”)), frequentative of Middle Dutch grommen (“to growl, grunt”). Cognate with Middle Low German grummelen (> Low German grummeln (“to grumble”)), German grummeln (“to grumble”), Norwegian dialectal grymja (“to growl,…

Etymology from Wiktionary, CC BY-SA 3.0