προσπολεμεῖν

From LSJ

τὸ δ' ἡδέως ζῆν καὶ ἱλαρῶς οὐκ ἔξωθέν ἐστιν, ἀλλὰ τοὐναντίονἄνθρωπος τοῖς περὶ αὑτὸν πράγμασιν ἡδονὴν καὶ χάριν ὥσπερ ἐκ πηγῆς τοῦ ἤθους προστίθησιν → but a pleasant and happy life comes not from external things, but, on the contrary, man draws on his own character as a source from which to add the element of pleasure and joy to the things which surround him

Source

Greek > English (Woodhouse Verbs Reversed)

(see also προσπολεμέω): wage war against

Lexicon Thucydideum

bello petere, to attack in war, 7.51.1, 8.96.5, 8.96.5