θρηνητικόν
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
Russian (Dvoretsky)
θρηνητικόν: τό печальное настроение, скорбь (τὸ γοερὸν καὶ θ. Plut.).