Plural of airn; multiple instances or references to the north wind or northern direction in Scottish or Northern English dialect.
From 'airn' + '-s' (plural). Maintains the Scottish/Northern English dialectal form when pluralized.
When you see 'airns' in old Scottish literature, you're reading language that wasn't 'correct' English in the capital—but it was authentic to real people. Modern linguists celebrate these regional variants because they preserve living language history.
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