Hey I get in trouble every time I mention Pharisees. And for the record Satan means lawyer. It’s a title.
Well, it means 'the accuser', what we would term 'prosecutor'. The office of Christ's first appearance is 'advocate', what we would term 'defense attorney'. The whole western legal system is based on that conceptual structure.
In the Book of Jude it states that the Archangel Michael, while contending with Satan for the body of Moses, dared not to bring an accusation against Satan so he rebuked him in the name of the Lord. He 'dared not' because he would have no longer been an Archangel, he would have become a disciple of Satan.
Fortunately, repentance is given to we mortals to get us around such traps!