In a manner that beckons; in a way that attracts or invites someone toward something.
From 'beckoning' (present participle of 'beckon') plus the adverbial suffix '-ly,' which transforms adjectives and participles into adverbs describing manner or fashion.
The word 'beckoningly' sounds inherently inviting—the soft '-ing' and '-ly' sounds almost mimic the gentle gesture of actually beckoning someone, which is a great example of how phonetics match meaning!
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