προθερμαίνω
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 warm first, Plu.2.725a, Gal.6.90, Procl.Sacr.p.149 B.:—Pass., of water, Arist.Mete.348b32, Fr.216.
German (Pape)
[Seite 723] vorher wärmen, Plut. Symp. 6, 4, 1 im aor. pass.
Greek (Liddell-Scott)
προθερμαίνω: θερμαίνω πρότερον, Πλούτ. 2. 690C. ― Παθ., ἐπὶ ὕδατος, Ἀριστ. Μετεωρ. 1. 12, 15, Ἀποσπ. 208.