Open English Wordnet
Nouns
(n)grunt, oinkthe short low gruff noise of the kind made by hogs (n)gruntan unskilled or low-ranking soldier or other worker“infantrymen in Vietnam were called ‘grunts’”,
“he went from grunt to chairman in six years” (n)gruntmedium-sized tropical marine food fishes that utter grunting sounds when caught Verbs
(v)gruntissue a grunting, low, animal-like noise“He grunted his reluctant approval”