Making low, rough sounds, usually from effort or displeasure, like the sound a pig makes.
From Old English 'grunnettan,' an onomatopoeia mimicking the actual sound a pig makes. The word has remained relatively unchanged for over 1,000 years because it literally imitates its own sound, making it stable across time.
Grunting is universal—humans from every culture grunt in almost identical ways during exertion, and we've learned that grunts during weightlifting or tennis actually help your muscles work harder by coordinating breathing with effort!
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