say it: fur-OH-shi-slee
ferociously is an adverb meaning "in a physically fierce manner". It carries one recorded sense.
in a physically fierce manner
“silence broken by dogs barking ferociously”
“they fought fiercely”
Definitions, synonyms and semantic relations for ferociously come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.