Read the dictionary definition of grunt. All definitions for this word.
1. medium-sized tropical marine food fishes that utter grunting sounds when caught
2. the short low gruff noise of the kind made by hogs
3. an unskilled or low-ranking soldier or other worker
1. infantrymen in Vietnam were called grunts
2. he went from grunt to chairman in six years
4. issue a grunting, low, animal-like noise
1. He grunted his reluctant approval