adj. opposing, contending with

nmf. opponent, rival, adversary; objector; counteracting muscle (Anatomy)

The following video provides you with the correct English pronunciation of the word "oponente", to help you become a better English speaker.

n. enemy, opponent

(n.) = antagonist ; objector ; competitor.
Ex: The emerging antagonists in this scenario are publishers who have an interest in increasing both the size and number of their periodicals.
Ex: Objectors to a major wind farm plan say developers have exaggerated its green benefits.
Ex: SLIS are rarely credited by their professional peers with the same degree of insight and analytical penetration as their potential competitors.
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* enfrentarse a + Posesivo + oponente = take on + Posesivo + opponent.
* oponente a = resister (of/against).

nm. objector