ὑπεναντίοςhypenantíos
GreekG52272 occurrences (KJV)
under (covertly) contrary to, i.e. opposed or (as noun) an opponent
KJV renders it: adversary, against
Where it appears
Lexical data: Strong’s Hebrew & Greek Dictionaries (1890, public domain; openscriptures, CC-BY-SA). Word tagging from the Strong’s-numbered KJV.