adverse

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Acting or serving to oppose; antagonistic.
• adjective Contrary to one's interests or welfare; harmful or unfavorable.
• adjective Moving in an opposite or opposing direction.

from The Century Dictionary.

• Being or acting in a contrary direction; opposed or opposing in position or course; opposite; confronting: most commonly used of hurtful or hostile opposedness, but sometimes of mere opposition in space.
• Antagonistic in purpose or effect; opposite; hostile; inimical: as, an adverse party; adverse criticism.
• Opposing desire; contrary to the wishes or to supposed good; hence, unfortunate; calamitous; unprosperous: as, adverse fate or circumstances.
• In botany, turned toward the axis: the opposite of averse, but rarely used. See anatropous.
• Averse, Inimical, etc. See hostile.
• Unfortunate, unlucky, calamitous, untoward, disastrous.
• To oppose.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb obsolete To oppose; to resist.
• adjective Acting against, or in a contrary direction; opposed; contrary; opposite; conflicting
• adjective Opposite.
• adjective In hostile opposition to; unfavorable; unpropitious; contrary to one's wishes; unfortunate; calamitous; afflictive; hurtful.
• adjective (Law) a possession of real property avowedly contrary to some claim of title in another person.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Unfavorable; antagonistic in purpose or effect; hostile; actively opposing one's interests or wishes; contrary to one's welfare; acting against; working in an opposing direction.
• adjective Opposed; contrary; opposing one's interests or desire.
• adjective not comparable Opposite; confronting.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective contrary to your interests or welfare
• adjective in an opposing direction