noun

grumbler

grumbler, complainer

My neighbour is a notorious grumbler.

My neighbor is a notorious grumbler.

Don't be such a grumbler all the time.

Don't be such a grumbler all the time.

((a/the)) grumbler a person who complains My neighbor is a notorious grumbler.

Synonyms: complainer, moaner, whiner; Antonyms: optimist

From the verb 'grumble' (to complain) plus the agent suffix '-er'. 'Grumble' itself is of imitative origin, like the sound of thunder.

Imagine a grumpy bear 'grumbling' in its cave. A 'grumbler' is a person who does that.

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