A variant or archaic term that may refer to a hollow, cave-like space, or possibly a dialectal word.
Possibly related to 'cave' or 'cavity,' though the etymological path is unclear. May be a Scots or regional English variant of cavity-related terms.
Cavin is so obscure that even most dictionaries barely acknowledge it—it's the kind of word that shows English's deep regional diversity, with hundreds of lost dialect words!
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