the act of infesting with fleas or covering as if with fleas; present participle of beflea.
From 'beflea' with the present participle suffix '-ing,' following standard English verb conjugation patterns.
The '-ing' form of such archaic verbs reminds us that English grammar rules allow infinite word creation—even if nobody has said 'befleaing' in 300 years, the rule that makes it grammatically valid is still alive.
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