The definition of a grunt:

“a low, short guttural sound made by an animal or a person.”

Many books describe the character grunting as a reply. What does it sound like? And do we use it daily? Is it like a “hm” or a “huh”?

An excerpt from a book:

“He reached out and took the pack from her. Finally, she thought. ‘Thank you.’ He grunted, slipping it over his shoulder before continuing on without another word.”