Ferocious a. : Fierce; savage; wild; indicating cruelty; ravenous; rapacious; as, ferocious look or features; a ferocious lion.

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Taxonomy
Merriam-Webster Online Dictionary, Dictionary, cious, webster, Word Games, Webster Online Dictionary with audio pronunciations, thesaurus, eye, glossary, english, language, ESL, Search, adjective, Etymology, Latin, ferox, ferus.

Defination from the web:
ferocious from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... 1 : exhibiting or given to extreme fierceness and unrestrained violence and brutality <a ferocious predator> 2 : extremely intense <ferocious heat> ...