imbrute

verb

1. To make brutal

   “It was his belief in his father's indifference or dislike that hardened and imbruted him; it is only when he hears how that father loved him that I now melt his pride and curb his passions.”

2. To degrade to the state of a brute

   “How deep was the change, made upon the imbruted Asiatics, we may perhaps question.”

   “So imbruted and stupefied by slavery was this old woman, that she seemed to think the selling her boy away from her a perfectly humane, Christian and proper act, while all her indignation was turned against me, who had merely afforded the boy an opportunity of securing his freedom!”

   “Notwithstanding all that has been said, the solitary is a man imbruted, vegetating, deprived of his crown.”