1] adversary (one who opposes another in purpose or act),
derivation: of Aramaic origin corresponding to (4566) (with the definite affix)
http://bible.crosswalk.com/Lexicons/Greek/grk.cgi?number=4567&version=kjv

(4566)
1] adversary (one who opposes another in purpose or act),
derivation: of Hebrew origin (07854)
http://bible.crosswalk.com/Lexicons/Greek/grk.cgi?number=4566&version=kjv

(07854)
1] adversary, one who withstands
   1.a] adversary (in general - personal or national)
2] superhuman adversary
   2.a] Satan (as noun pr
derivation: from (07853)
http://bible.crosswalk.com/Lexicons/Hebrew/heb.cgi?number=7854&version=kjv

(07853)
1] (Qal) to be or act as an adversary, resist, oppose
derivation: a primitive root
http://bible.crosswalk.com/Lexicons/Hebrew/heb.cgi?number=7853&version=kjv