"Adversary" is one of the New Testament’s direct titles for Satan. Peter writes: "Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour" (1 Peter 5:8). The Hebrew satan means literally "adversary" — the one who stands opposite, accuses in court (Job 1:6-12; Zechariah 3:1-2), opposes in field (Numbers 22:22), and ambushes on road. The same word names the angel of the LORD who blocked Balaam’s path. Satan is the personal proper-name adversary par excellence — the prosecutor of the saints before God. Christ has disarmed him at the cross: "having spoiled principalities and powers, he made a shew of them openly, triumphing over them in it" (Colossians 2:15).
An enemy; one that opposes; in Scripture, especially Satan as the saint's adversary.
ADVERSARY, n. An enemy; a foe; an antagonist; one that opposes.
Hebrew satan means literally adversary, originally a generic term (David is called Saul's satan in 1 Sam 29:4) and gradually personalized into the name of the chief evil being. The Greek diabolos (devil) is etymologically slanderer; adversary retains the older Hebrew sense.
1 Peter 5:8 — "Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour."
Job 1:6 — "Now there was a day when the sons of God came to present themselves before the LORD, and Satan came also among them."
Zechariah 3:1 — "And he shewed me Joshua the high priest standing before the angel of the LORD, and Satan standing at his right hand to resist him."
Revelation 12:10 — "For the accuser of our brethren is cast down, which accused them before our God day and night."
Modern Christianity sometimes denies the personal devil; Scripture names him by office and warns the saints against him by name.
1 Peter 5:8 has the adversary walking about — a real, personal, active opponent of the saint. The metaphor (roaring lion) is sober. The verb is precise: he walks, he seeks, he devours.
The household that pretends he is not real is unprepared for what he does. Recovery is sober vigilance, not paranoia: be sober, be vigilant. The saint stands armed; the adversary remains a defeated foe whose final ruin is sealed.
Hebrew satan and Greek antidikos (1 Pet 5:8) cover the term.
Hebrew satan — adversary, accuser.
Greek antidikos — opponent in a lawsuit; legal adversary.
"The adversary walks; the saint stands armed."
"Be sober, be vigilant."
"Pretending he is not real does not unmake him."