IPA: /ˈfjʊəriəsli/
KK: /ˈfjʊrɪəsli/
In a way that shows strong anger or intense emotion; done with great speed or effort.
She furiously typed her response to the email.
Furiously → It is formed from "furor" (from Latin, meaning rage or fury) and the suffix "-ously" (meaning in a manner characterized by). The word "furiously" means in a manner characterized by intense rage or fury.
Think of 'furor' which means rage, and remember that 'furiously' describes acting in a way that is full of rage.