Ferocious (adjective)

1. Extremely fierce, violent, or brutal.
2. Extremely severe or intense.

Origin:

Ferocious (adj) late middle english: from old french féroce, from latin ferox, feroc- "fierce, wild", from ferus "wild", also related to greek thēr (genitive thēros) "beast".

Examples:

1. The tiger's ferocious roar startled the visitors.
2. The storm was ferocious and caused extensive damage.
3. Ferocious winds blew down many trees.
4. She has a ferocious temper and can be very intimidating.
5. The dog had a ferocious bite and was feared by many.