'Adversary' in the Bible

Now there was a day when the sons of God (angels) came to present themselves before the Lord, and Satan (adversary, accuser) also came among them.

Then the Lord said to Satan, “Behold, all that Job has is in your power, only do not put your hand on the man himself.” So Satan departed from the presence of the Lord.

Again there was a day when the sons of God (angels) came to present themselves before the Lord, and Satan (adversary, accuser) also came among them to present himself before the Lord.

The Lord said to Satan, “From where have you come?” Then Satan answered the Lord, “From roaming around on the earth and from walking around on it.”

“His wrath has torn me and hunted me down,He has gnashed at me with his teeth;My adversary sharpens His gaze and glares [with piercing eyes] at me.

“Oh, that I had one to listen to me!Look, here is my signature (mark);Let the Almighty answer me!Let my adversary write out His indictment [and put His vague accusations in tangible form].