κόκκυ
From LSJ
Τὸ μανθάνειν δ' ἥδιστον εὖ λέγοντος, εἰ κέρδος λέγοι → It is the sweetest thing to learn from one speaking well, if they speak profitably
English (LSJ)
A cuckoo! the bird's cry, Ar.Av.505; as an exclam., now! quick! (ταχύ Suid.), κόκκυ, πεδίονδε ib.507; κόκκυ, μεθεῖτε quick—let go, Id.Ra.1384; οὐδὲ κ., = οὐδὲ βραχύ, AB105. (Onomatop.)