'Opponent' in the Bible

Come to terms without delay with your opponent while you are yet with him on the way to the court; for fear he should obtain judgement from the magistrate against you, and the magistrate should give you in custody to the officer and you be thrown into prison.

For when, with your opponent, you are going before the magistrate, on the way take pains to get out of his power; for fear that, if he should drag you before the judge, the judge may hand you over to the officer of the court, and the officer lodge you in prison.

and that neither in the Temple nor in the synagogues, nor anywhere in the city, did they find me disputing with any opponent or collecting a crowd about me.

If one of you has a grievance against an opponent, does he dare to go to law before irreligious men and not before God's people?