Adversary - Vine's Expository Dictionary of New Testament Words
Adversary[ A-1,Noun,G476, antidikos ]
firstly, an opponent in a lawsuit," Matthew 5:25 (twice); Luke 12:58; Luke 18:3, is also used to denote "an adversary or an enemy," without reference to legal affairs, and this is perhaps its meaning in 1 Peter 5:8, where it is used of the Devil. Some would regard the word as there used in a legal sense, since the Devil accuses men before God.
[ B-1,Verb,G480, antikeimai ]
is, lit., "to lie opposite to, to be set over against." In addition to its legal sense it signifies "to withstand;" the present participle of the verb with the article, which is equivalent to a noun, signifies "an adversary," e.g., Luke 13:17; Luke 21:15; 1 Corinthians 16:9; Philippians 1:28; 1 Timothy 5:14. This construction is used of the Man of Sin, in 2 Thessalonians 2:4, and is translated "He that opposeth," where, adopting the noun form, we might render by "the opponent and self-exalter against..." In Galatians 5:17 it is used of the antagonism between the Holy Spirit and the flesh in the believer; in 1 Timothy 1:10, of anything, in addition to persons, that is opposed to the doctrine of Christ. In these two places the word is rendered "contrary to." In the Sept. it is used of Satan, Zechariah 3:1, and of men, Job 13:24; Isaiah 66:6. See CONTRARY, OPPOSE.
[ C-1,Adjective,G5227, hupenantios ]
"contrary, opposed," is a strengthened form of enantios (en, "in," and antios, "set against"). The intensive force is due to the preposition hupo. It is translated "contrary to," in Colossians 2:14, of ordinances; in Hebrews 10:27, "adversaries." In each place a more violent form of opposition is suggested than in the case of enantios. See CONTRARY.