Lexical Definition

‎ἔχθρα‎ échthra (ekh'-thrah) hostility ^G:N-F
feminine of ‎ἐχθρός‎

enmity, hatred.

• hostility
• by implication, a reason for opposition

Abbott-Smith

ἔχθρα, -ας, ἡ (< ἐχθρός), [in LXX for אֵיבָה, שִׂנְאָה, etc.;]
enmity: Lk 23:12, Ro 8:7, Ga 5:20, Eph 2:15, 16, Ja 4:4.†

Abbott-Smith References

Liddell-Scott-Jones

ἔχθρα-α,

Ionic dialect ἔχθραη, ἡ, hatred, enmity, [Refs 5th c.BC+]: in philosophical sense, ={νεῖκος}[Refs 3rd c.AD+]; ἔ. τινός hatred for, enmity to one, [ἔχθρααν τινός 5th-6th c.BC: Aristophanes Comicus “Pax” 133; ἔ. ἔς τινα 5th c.BC: Herodotus Historicus 1.5, 5th c.BC: Thucydides Historicus 2.68; εἴς θεόν NT.Rom.8.7; πρός τινα 4th-5th c.BC: Aeschylus Tragicus “Prometheus Vinctus” 491 (\_plural\_), 5th c.BC: Thucydides Historicus 2.68 ">NT+5th c.BC+]; δι᾽ ἔχθραας μολεῖν, ἀφῖχθαί τινι, to be at feud with one, [ἔχθραας οὐδετέρῳ γενήσομαι 5th-6th c.BC: Aristophanes Comicus “Ranae” 1412; εἰς ἔ. βάλλειν τινά 4th-5th c.BC: Aeschylus Tragicus “Prometheus Vinctus” 390; εἰς ἔ. ἐλθεῖν 4th c.BC: Demosthenes Orator 21.62; καταστῆσαί τινας εἰς ἔχθρααν τῷ δήμῳ 5th-6th c.BC: Xenophon Historicus “Historia Graeca (Hellenica)” 3.5.9; πολλὴν εἰς ἔχθρααν ἀλλήλοις καὶ πολλῶν πέρι καθίστανται 5th-6th c.BC: Plato Philosophus “Politicus” 307d, compare 5th-6th c.BC: Isocrates Orator 9.67 ">Refs 5th c.BC+]; πρὸς ἔχθρααν from personal enmity, [Refs 4th c.BC+]; ἔ. συμβάλλειν, συνάπτειν τινί, to engage in hostility with.., [Refs 5th c.BC+], of undying hatred, [Refs 5th c.BC+]

_{LSJ Scripture Refs: Rom.8.7}