Webster’s Revised Unabridged Dictionary · 1913
Imbrute
Im·brute′ (ĭm·brṳt′), v. t. [imp. & p. p. Imbruted; p. pr. & vb. n. Imbruting.] [Pref. im- in + brute: cf. F. abrutir. Cf. Embrute.] To degrade to the state of a brute; to make brutal.
And mixed with bestial slime, THis essence to incarnate and imbrute. Milton.
Im·brute′, v. i. 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.