Jude 16 These are grumblers, complainers, walking according to their own lusts; and they mouth great swelling words, flattering people to gain advantage.
Jude refers to the ungodly first as grumblers and complainers. The two words are synonymous but one is slightly more aggravated. To be a grumbler is to complain. We may easily find records of the Jews complaining against God during the wilderness wanderings and His reaction to such ungrateful, spiteful, unfaithful conduct, which emanates from an unbelieving heart.
