A dialectal or archaic word meaning to grunt or make a low guttural sound, especially used in Scots.
From Old Norse grúna or similar Germanic roots related to grunting sounds made by animals. The word is cognate with grunt and may be an even more primitive onomatopoeia for animal vocalizations.
The word 'grun' might be even older than 'grunt'—it comes from Norse invaders in Scotland, showing how invading Vikings left their animal-sound words in the Scottish vocabulary!
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