φιλαδέλφως

From LSJ

μοῦνοι Ἑλλήνων δὴ μουνομαχήσαντες τῷ Πέρσῃ → alone of all Greeks we met the Persian singlehandedly, alone of all Greeks having fought singlehanded with the Persians

Source

Greek Monolingual

ΝΜΑ
επίρρ. βλ. φιλάδελφος.