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

• metapsychological
• metapsychology
• metasequoia
• metasequoias
• metasilicate
• metasilicates
• metasilicic
• metasomatic
• metasomatism
• metasomatisms
• metastabilities
• metastability
• metastable
• metastable state
• metastases
• metastasis
• metastasise
• metastasised
• metastasises
• metastasising
• metastasize
• metastasized
• metastasizes
• metastasizing
• metastatic