εὐπρεπές

From LSJ

τὸ ἀνάλημμα καὶ τὴν ἐπ' αὐτοῦ κερκίδα → the retaining wall and the wedge of theatre seats supported by it

Source

Russian (Dvoretsky)

εὐπρεπές: τό Thuc. = εὐπρέπεια.