bovine (adj.)

1817, "of or like oxen," from French bovin (14c.), from Late Latin bovinus, from Latin bos (genitive bovis) "cow," originally "ox," "a loan word from a rural dialect" [Buck, who cites Umbrian bue], from PIE root *gwou- "ox, bull, cow." Figurative sense of "inert and stupid" is from 1855.