A person who persistently grumbles; a complainer(noun)
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Use "grumbler" in a sentence
"Indeed, Esmond's general, who was known as a grumbler, and to have a hearty mistrust of the great Duke, and hundreds more officers besides, did not scruple to say that these private reasons came to the Duke in the shape of crown-pieces from the French King, by whom the"
"This blog takes its name from the French word grognard, which means roughly "grumbler" or "grouch.""
"Indeed, Esmond’s general, who was known as a grumbler, and to have a hearty mistrust of the great Duke, and hundreds more officers besides, did not scruple to say that these private reasons came to the Duke in the shape of crown-pieces from the French King, by whom the"