δυσαύχενος

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

Spanish (DGE)

-ον
1 malo de llevar al cuello, difícil de aguantar ζυγός Rom.Mel.55.κβʹ.2.
2 que apenas dobla la cerviz fig. altanero φύσις Rom.Mel.80.ιδʹ.4.