'Adversary' in the Bible

Agree with your adversary quickly, while you are with him in the way; lest perhaps the prosecutor deliver you to the judge, and the judge deliver you to the officer, and you be cast into prison.

For when you are going with your adversary before the magistrate, try diligently on the way to be released from him, lest perhaps he drag you to the judge, and the judge deliver you to the officer, and the officer throw you into prison.

A widow was in that city, and she often came to him, saying, 'Defend me from my adversary!'

I desire therefore that the younger widows marry, bear children, rule the household, and give no occasion to the adversary for insulting.

Be sober and self-controlled. Be watchful. Your adversary, the devil, walks around like a roaring lion, seeking whom he may devour.