Past participle of begnaw; completely gnawed or eaten away.
Past participle form of begnaw using the strong verb ending -n (like 'known' or 'grown'), which was common for older English verbs before regularization to -ed.
The -n ending marks this as belonging to an older stratum of English morphology—most strong verbs have shifted to regular -ed endings over time, so 'begnawn' is a linguistic time capsule of how verbs were conjugated centuries ago.
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