furiously

Concise Oxford English Dictionary © 2008 Oxford University Press:
furious/ˈfjʊəriəs/

▶adjective

• 1 extremely angry.

• 2 full of energy or intensity.

– derivatives
furiously adverb,
furiousness noun.

– origin ME: from OFr. furieus, from L. furiosus, from furia ‘fury’.