διαπολεμεῖν

From LSJ

χρώμεθα γὰρ πολιτείᾳ οὐ ζηλούσῃ τοὺς τῶν πέλας νόμους → we live under a form of government which does not emulate the institutions of our neighbours

Source

Greek > English (Woodhouse Verbs Reversed)

(see also διαπολεμέω): fight it out

Lexicon Thucydideum

bellum sustinere, to sustain a war, 6.37.1,
debellare, to finish a war, 8.87.4,
PASS. debellari, to be subdued, 7.14.3, [nonnulli codd. several manuscripts διαπεπολ.] 7.25.9, [Vat. Vatican manuscript διαπεπολ.].