adversative

adjective

ad·​ver·​sa·​tive əd-ˈvər-sə-tiv 

ad-

: expressing antithesis, opposition, or adverse circumstance

the adversative conjunction but

adversative noun

adversatively adverb

Word History

Etymology

Middle English adversatyf, borrowed from Late Latin adversātīvus, from Latin adversātus, past participle of adversārī "to act contrary to, oppose" (derivative of adversus adverse) + -īvus -ive

First Known Use

15th century, in the meaning defined above