In a manner that is apoplectic; in a way that shows extreme anger or resembles someone having a stroke.
From apoplectic plus the adverbial suffix -ly. This creates an adverbial form that describes how an action is performed in an apoplectic manner.
When someone yells 'apoplectically,' they're not just angry—they're that specific kind of rage where you can practically see the steam coming out of their ears, like they're about to have a medical emergency right there in front of you.
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