1. Contrary to your interests or welfare
   "adverse circumstances"
   - inauspicious, untoward 
2. In an opposing direction
   "adverse currents"
   - contrary

See also: adversely, adversity, unfavorable [US], unfavourable [Brit, Cdn]

Encyclopedia: Adverse

• take stock
• take ten
• take the air
• take the bull by the horns
• take the cake
• take the count
• take the field
• take the Fifth
• take the Fifth Amendment
• take the floor
• take the Mickey
• take the piss
• take the road
• take the stage
• take the stand
• take the veil
• take time by the forelock
• take time off
• take to
• take to be
• take to heart
• take to task
• take to the woods
• take turns
• take up arms