διαψιθυρίζω
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
English (LSJ)
A whisper, πρὸς τὸ οὖς προσπίπτων δ. Thphr.Char.2.10. II whisper among themselves, LXXSi.12.18, Plb.15.26.8, Luc. Gall.25.
German (Pape)
[Seite 614] durchzischeln, flüstern, Pol. 15, 26, 8; πρὸς ἀλλήλους, Luc. Somn. 25.