ἐκπολεμεῖν

From LSJ

Οὐκ ἔστι σιγᾶν αἰσχρόν, ἀλλ' εἰκῆ λαλεῖν → Silere non est turpe, sed frustra loqui → nicht Schweigen schändet, sondern Schwätzen auf gut Glück

Menander, Monostichoi, 417

Lexicon Thucydideum

bello petere, bellum inferre, to attack in war, make war on, 6.91.5,
PASS. hostis fieri, to become an enemy, 8.57.1, [Vat. Bekk. Goell. Did. Vatican Bekker Goeller Dindorf edition ἐκπεπολεμῶσθαι].