adversary

a person who opposes you or your interests; an enemy or rival in a struggle, contest, etc.

enemigo, adversario, oponente

• an adversary of somebody/something

Collocations political adversary · legal adversary

• He was seen as the main political adversary.

  Se le consideró como el principal adversario político.

a person or thing that presents a challenge to you; an opponent in a game, contest, etc.

desafío, contrincante, rival

• an adversary in something

Collocations adversary in a competition · adversary in battle

• She faced her greatest adversary yet.

  Se enfrentó a su mayor adversario hasta la fecha.