Webster's Revised Unabridged Dictionary · 1913

Imbrute

Imbrute , transitive verb

[Prefix im- in + brute: compare French abrutir. Compare Embrute.]

To degrade to the state of a brute; to make brutal.
And mixed with bestial slime, THis essence to incarnate and imbrute. — Milton

Imbrute , intransitive verb

To sink to the state of a brute.
The soul grows clotted by contagion, Imbodies, and imbrutes, till she quite lose The divine property of her first being. — Milton