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)

oppoˈnency noun

• unchained
• unchaining
• unchains
• unchallengeable
• unchallengeably
• unchallenged
• unchallenging
• unchancier
• unchanciest
• unchancy
• unchangeabilities
• unchangeability
• unchangeable
• unchangeableness
• unchangeably
• unchanged
• unchanging
• unchangingly
• unchaperoned
• uncharacteristic
• uncharge
• uncharged
• uncharges
• uncharging
• uncharitable