grumbler, complainer, malcontent; see agitator, radical.
"murmurer." YourDictionary, n.d. Web. 19 September 2018. <http://thesaurus.yourdictionary.com/murmurer>.
murmurer. (n.d.). Retrieved September 19th, 2018, from http://thesaurus.yourdictionary.com/murmurer
A person who habitually complains or grumbles:
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