καταλαβεῖν

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)

Source

Greek Monotonic

καταλᾰβεῖν: απαρ. αορ. βʹ του καταλαμβάνω.