Webster's Revised Unabridged Dictionary · 1913

Ferocity

Ferocity , noun

[Latin ferocitas, from ferox, -ocis, fierce, kin to ferus wild: compare French ferocité. See Fierce.]

Savage wildness or fierceness; fury; cruelty; as, ferocity of countenance.
The pride and ferocity of a Highland chief. — Macaulay