ἀναρρηγνύναι

From LSJ

τὸ ἐμόν γ' ἐμοὶ λέγεις ὄναρ → you are telling me what I know already, you are telling me my own dream

Source

Greek > English (Woodhouse Verbs Reversed)

(see also ἀναρρήγνυμι): tear open, break open

Lexicon Thucydideum

perfringere, to break through, 7.36.3, 7.40.5,
PASS. 7.34.5.