βοὴν ἀγαθός
From LSJ
μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea
Greek to English
good at the war cry, good at the battle-cry, master of the war-cry, good at shouting (Homer, Iliad 2.408)
Spanish
bueno para lanzar el grito de guerra, valiente en el combate