grunt

US /ɡrʌnt/
UK /ɡrʌnt/
"grunt" picture
1.

a low, guttural sound made by an animal (especially a pig) or a person

:
The pig let out a loud grunt as it rooted in the mud.
He responded with a noncommittal grunt.
2.

a low-ranking or unskilled worker, especially in the military

:
He started as a lowly grunt in the company.
The project needs more grunts to get the work done.
1.

to make a low, guttural sound

:
He tends to grunt when he lifts heavy weights.
She just grunted in response to my question.