βοὴν ἀγαθός
From LSJ
τὸ κακὸν δοκεῖν ποτ' ἐσθλὸν τῷδ' ἔμμεν' ὅτῳ φρένας θεὸς ἄγει πρὸς ἄταν → evil appears as good to him whose mind the god is leading to destruction (Sophocles, Antigone 622f.)
Greek to English
good at the war cry, good at the battle-cry, master of the war-cry, good at shouting
Spanish
bueno para lanzar el grito de guerra, valiente en el combate