Bestial

People talk sometimes of a bestial cruelty, but that's a great injustice and insult to the beasts; a beast can never be so cruel as a man, so artistically cruel. The tiger only tears and gnaws, that's all he can do. He would never think of nailing people by the ears, even if he were able to do it.

Source: tatoeba (918777)

War is a disgusting relic of humanity's bestial past.

Source: tatoeba (10147380)

Such are the data that clearly show the bestial face of the colonialists, the essence of their "civilizing" activities in the colonies.

Source: tatoeba (10714995)

Reputation, reputation, reputation! O, I have lost my reputation! I have lost the immortal part of myself, and what remains is bestial.

Source: wiktionary