ὑπέρθυρον
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
Greek Monotonic
ὑπέρθῠρον: τό, = το προηγ., σε Ηρόδ.
Russian (Dvoretsky)
ὑπέρθῠρον: τό верхний дверной брус, притолока Her., Arst., Plut.