Plural of 'brin,' which is a single stalk or blade of grass.
From Old English 'brind' or Middle English 'brin,' meaning a single stem or shoot of grass; likely Germanic in origin, related to words meaning blade or grass.
When you say 'not a brin of grass,' you're talking about the tiniest unit—a single blade. It's an old word that shows how finely people once needed to describe grass and plants in agricultural societies.
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