ἀκυιλίφερ
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
Spanish (DGE)
ὁ
lat. aquilifer e.e. portador del águila, SEG 49.2103 (Arabia, imper.).