In a charming or enchanting way that delights or deceives.
From 'beguile' + '-ing' (present participle) + '-ly' (adverb suffix). The '-ly' suffix converts adjectives and participles into adverbs, which is one of English's most productive word-building patterns.
The '-ly' adverb suffix is so common that we barely notice it, but it's a genius piece of English grammar—any adjective can become an adverb by adding '-ly,' letting us describe how actions happen with incredible flexibility.
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