συλλαμβάνεσθαι
From LSJ
τὸ ἐμόν γ' ἐμοὶ λέγεις ὄναρ → you are telling me what I know already, you are telling me my own dream
Greek > English (Woodhouse Verbs Reversed)
(see also συλλαμβάνω): be instrumental in, contribute to, contribute towards, help to