"grunt" in the noun sense

1. grunt, oink

the short low gruff noise of the kind made by hogs

2. grunt

an unskilled or low-ranking soldier or other worker

"infantrymen in Vietnam were called grunts"

"he went from grunt to chairman in six years"

3. grunt

medium-sized tropical marine food fishes that utter grunting sounds when caught

"grunt" in the verb sense

1. grunt

issue a grunting, low, animal-like noise

"He grunted his reluctant approval"

Source: WordNet® (An amazing lexical database of English)

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