adjective
- savagely fierce, as a wild beast, person, action, or aspect; violently cruel: a ferocious beating.
- extreme or intense: a ferocious thirst.
adjective
- savagely fierce or cruela ferocious tiger; a ferocious argument
1640s, from Latin ferocis, oblique case of ferox “fierce, wild-looking” (see ferocity). Related: Ferociously; ferociousness.