In a way that shows someone is taking credit or authority they don't deserve, done with arrogance.
From arrogating (verb) + -ly (adverbial suffix). The -ly suffix transforms the gerund/adjective into an adverb describing how an action is performed, following English word formation patterns from the 16th century onward.
When someone speaks arrogatingly, they're not just wrong—they're confidently wrong, which is part of what makes arrogance so frustrating to witness.
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