contra
against
counter
against or opposite
Contra means against and is related to the English word counter0, which also means against or opposite0.
preposition
  1. against
    Against, opposite to, or contrary to
    Estoy contra esa idea. // I am against that idea.
noun
  1. disadvantage
    Disadvantage or drawback
    La única contra de este trabajo es el horario. // The only disadvantage of this job is the schedule.