In a manner that belies or contradicts; in a way that gives a false impression or misrepresents something.
Formed from 'belying' (present participle of 'belie') plus the adverbial suffix '-ly,' creating an adverb that modifies verbs or adjectives.
This is such a rare adverb that most English speakers have never encountered it—it's the kind of word that exists grammatically but is almost never used in actual communication.
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