cacillo
From LSJ
τὸ ἐμόν γ' ἐμοὶ λέγεις ὄναρ → you are telling me what I know already, you are telling me my own dream
Latin > French (Gaffiot 2016)
căcĭllō, āre, intr., glousser : Anth. 762, 25.
Latin > German (Georges)
cacillo, āre, gackeln, gackern, Naturschrei des Huhns, Anthol. Lat. 762, 25 R. (233, 25 M. gracillat).