grunt

nouns

the short low gruff noise of the kind made by hogs
an unskilled or low-ranking soldier or other worker
"infantrymen in Vietnam were called grunts"; "he went from grunt to chairman in six years"
is a type of (narrower)
a person who lacks technical training
medium-sized tropical marine food fishes that utter grunting sounds when caught
is a member of
grunts
is a type of (narrower)
any of numerous spiny-finned fishes of the order Perciformes

verbs

issue a grunting, low, animal-like noise
"He grunted his reluctant approval"
is derived from
is derived from
is a type of (narrower)
express audibly; utter sounds (not necessarily words)
"She let out a big heavy sigh"; "He uttered strange sounds that nobody could understand"