opponent
US /əˈpoʊ.nənt/
UK /əˈpoʊ.nənt/
1.
someone who competes against or fights another in a contest, game, or argument
:
•
He defeated his opponent in the final round.
•
The debaters presented strong arguments against their opponents.
2.
a person or group who is against something, such as a policy, idea, or action
:
•
The new policy faced strong resistance from its opponents.
•
She became a vocal opponent of the proposed development.