Mostly. Satan comes via the Hebrew ‘Shaitan’ meaning as you say “Adversary,” but also “Accuser” as well. In the Torah, that word is used to describe human enemi

Mostly. Satan comes via the Hebrew ‘Shaitan’ meaning as you say “Adversary,” but also “Accuser” as well. In the Torah, that word is used to describe human enemies, and IIRC it doesn’t exist as a supernatural force. If you think about it, the notion of any sort of counterpart to God is too close to polytheism for Judaism.