opponent /ə-pōˈnənt/

1. The person opposed to one in a contest, struggle, battle, etc
2. Someone who opposes a course of action, belief, etc
3. An opponent muscle (anatomy)

1. Opposing
2. Antagonistic (with to; formerly with with)
3. Placed opposite or in front
4. (of a muscle) opposing one part (eg a digit) to another (anatomy)

• demoralizing
• demos
• demoses
• Demosthenic
• demote
• demoted
• demotes
• demotic
• demoticist
• demoticists
• demotics
• demoting
• demotion
• demotions
• demotist
• demotists
• demotivate
• demotivated
• demotivates
• demotivating
• demotivation
• demount
• demountable
• demounted
• demounting