ἐγερτέον
From LSJ
ἐπ' αὐτὸν ἥκεις τὸν βατῆρα τῆς θύρας → you've come to the crux of the matter, come to the point, hit the nail on the head, you've come to the very threshold of the door, you are come to the very threshold of the door, you've arrived at the truth of the matter
English (LSJ)
A one must raise, E.Rh.690.
Greek (Liddell-Scott)
ἐγερτέον: ῥηματ. ἐπίθ., πρέπει τις νὰ ἐγείρῃ, Εὐρ. Ρῆσ. 690.
Spanish (DGE)
1 fig. hay que levantar c. obj. concr. ἢ βοὴν ἐ.; E.Rh.690.
2 gram. hay que elevar el tono de una sílaba para convertirlo en agudo τὴν «τοι» συλλαβὴν ἐ. Hdn.Gr.2.155.