προκόπτειν
From LSJ
κῶς ταῦτα βασιλέϊ ἐκχρήσει περιυβρίσθαι → how will it be good enough for the king to be insulted with these things
Greek > English (Woodhouse Verbs Reversed)
(see also προκόπτω): advance, improve, gain ground, make headway
Lexicon Thucydideum
promovere, to move forward, advance, 4.60.2, 7.56.3.