adverse

Definitions:

Opposite.
- Newage Dictionary DB (adjective) (adj.) (adjective)
Acting in a contrary direction: opposed to: unfortunate.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)
ADVERSENESS.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
Opposed to; unfavorable; unfortunate.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (adjective) (adj.) (adjective)
Opposed to; unfortunate; calamitous.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
Opposed to; opposite; unfavorable; contrary; hostlle; unfortunate; as, adverse circumstances.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Adversely.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adverb) (adv.) (adverb)
Acting in a contrary direction; opposing; thwarting; unprosperous.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
To oppose; to resist.
- Newage Dictionary DB (verb) (v. t.) (verb transitive)

Usage examples:

Is it surprising if we feel that their adverse interference in matters which so vitally affect us has long since become intolerable?
- Native-Life-in-South-Africa by Plaatje, Sol (Solomon Tshekisho)
The day closing with an adverse balance knew no hour of song.
- The Doctor A Tale Of The Rockies by Ralph Connor
A strong right arm on which to lean, a safe harbor where adverse winds never blow, nor rough seas roll, makes a most inviting picture.
- The Woman's Bible Part I. Comments on Genesis, Exodus, Leviticus, Numbers and Deuteronomy. Part II. Comments on the Old and New Testaments from Joshua to Revelation. by Elizabeth Cady Stanton