/ fəˈrəʊʃəs; NAmE -ˈroʊ-/ adjective
very aggressive or violent; very strong
SYN savage :
a ferocious beast / attack / storm
a man driven by ferocious determination
ferocious opposition to the plan
► fer·ocious·ly adverb
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WORD ORIGIN
mid 17th cent.: from Latin ferox , feroc- fierce + -ious .