Strong's #1113: goggustes (pronounced gong-goos-tace')
 from 1111; a grumbler:--murmurer.
Thayer's Greek Lexicon:
 ́ 
 
  goggustēs 
 
 1) a murmurer, one who discontentedly complains (against God)
 
  Part of Speech: noun masculine
Relation: from G1111
  Citing in TDNT: 1:737, 125
 
Usage:
This word is used 1 times:
Jude 1:16: "These are  murmurers, complainers, walking after their own lusts;"