From a primary word ἔχθω echthō (to hate); hateful (passively {odious} or actively hostile); usually as a {noun} an adversary (especially Satan): - {enemy} foe.
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Luk 23:12¶ And the same day Pilate and Herod were made friends together: for before they were at enmityG2189 between themselves.
Eph 2:15Having abolished in his flesh the enmityG2189, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace;
Jam 4:4Ye adulterers and adulteresses, know ye not that the friendship of the world is enmityG2189 with God? whosoever therefore will be a friend of the world is the enemy of God.