grumbler

Etymology
From.

Noun

 * 1) A person who persistently grumbles; a complainer.
 * 2) * 1890, American Street Railway Association, Verbatim Report of the Proceedings of the Convention (page 169)
 * But the grumbler must be heard through the newspapers, and a great deal of unpleasantness comes to newspapers from the grumbler; and the newspapers, and not the grumbler, nearly always have to take the brunt of the trouble.
 * But the grumbler must be heard through the newspapers, and a great deal of unpleasantness comes to newspapers from the grumbler; and the newspapers, and not the grumbler, nearly always have to take the brunt of the trouble.

Translations

 * Catalan: rondinaire, botzinaire
 * Chinese: Mandarin:发牢骚的人
 * Finnish:
 * Greek:
 * Ancient: γογγυστής
 * Manx: accanagh, talleyder, trughanagh
 * Russian:, , ворчу́шка
 * Swedish:, , , brumbjörn, gnällpipa,
 * Welsh: grwgnachwr, grwgnachwraig