This is the 12789th most frequent Spanish word.
opositor
Opponent; someone who opposes or is in opposition.
In this sentence, 'opositor' is used as a noun referring to the adversary in a discussion or debate.
El opositor en el debate defendió su postura con argumentos sólidos.
The opponent in the debate defended their stance with solid arguments.
Here, 'opositores' signifies individuals who oppose the project or initiative being discussed, again used as a noun.
Los opositores al proyecto expresaron sus preocupaciones durante la reunión.
The opponents to the project expressed their concerns during the meeting.
In this instance, 'opositor' refers to someone preparing for a competitive examination or contest, used as a noun specific to the context of exams.