contrarious

adjective

con·​trar·​i·​ous kən-ˈtrer-ē-əs 

kän-

: perverse, antagonistic

Word History

Etymology

Middle English, "opposite. different, contrary, adverse, antagonistic," borrowed from Anglo-French, borrowed from Medieval Latin contrāriōsus, from Latin contrārius "opposite, opposed, contrary entry 2" + -ōsus -ous

First Known Use

13th century, in the meaning defined above