#adversar

• Opponent — A person, group, or entity engaged in a fight, competition, dispute, or open opposition with someone; a direct opponent in a physical, intellectual, political, or legal confrontation. In a profound sense, the term does not necessarily imply personal enmity, but defines the structural role of a contrary force within a competitive system.
• Female opponent — A woman, female team, or feminine entity engaged in a competition, conflict, or open opposition with someone. The term reflects the feminine equivalent of the opponent, describing a critical force or direct competitor within any agonistic structure, maintaining the values of a performance catalyst.
• Antagonist — Being in antagonism or manifesting an active and constant opposition to someone or something else. In literature and cinema, it represents the character, force, or structural element that opposes the protagonist, generating the main conflict. In anatomy and physiology, it describes a muscle that executes a movement contrary to the movement performed by another muscle (agonist).
• Antagonistic — Manifesting, containing, or characterized by antagonism; deeply hostile, incompatible, and in a permanent state of structural or functional opposition. It applies to relationships, behaviors, or forces whose components actively work against each other, preventing harmony and generating latent or overt conflict.
• Let the other side be heard also — A foundational legal and ethical principle derived from Roman law, translating literally to 'let the other side be heard as well'; the rule of absolute adversary procedure. This maxim establishes the core obligation of any judge, arbitrator, or authority not to hand down a decision before listening to the arguments, defenses, and evidence of both parties.