ἀκοός
From LSJ
λέγεις, ἃ δὲ λέγεις ἕνεκα τοῦ λαβεῖν λέγεις → you speak, but you say what you say for the sake of gain (Menander, fr. 776)
English (LSJ)
όν, A = ἀκουστικός, Pl.Com.226.
Greek (Liddell-Scott)
ἀκοός: -όν, = ἀκουστικός, Πλάτ. Κωμ. Ἄδηλ. 61.