αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
v. ᾆσμα.
(=τραγούδι). Παράγωγο τοῦ ᾄδω, ὅπου δές γιά περισσότερα παράγωγα.