ἐχθρός (echthrós|ech-thros'|adjective|enemy)
[Grk] ἐχθρός LN: 39.11 GK: G2398 Hebrew: אָיַב‎, אֵיבָה‎, אָכַל‎, גֹּוי‎, זֵר‎, מֹות‎, עָר‎, עָרַב‎, צָמַת‎, צַר‎, צָרַר‎, קוּם‎, רַע‎, שׁוּר‎, שָׂנֵא‎
Derivation: from a primary ἔχθω (to hate);
Strong's: hateful (passively, odious, or actively, hostile); usually as a noun, an adversary (especially Satan)
KJV: --enemy, foe.