A variant or dialectal form related to grapnel or grappling, possibly referring to a small grappling hook or device.
Likely a dialectal or obsolete variant of 'grapnel' (from Old French 'grapin'), with the '-lin' suffix often used in older English to create diminutive forms.
This appears in historical texts as a naval or nautical term, representing the kind of specialized vocabulary that sailors developed for specific tools before standardization of English spelling.
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