πορφυροβάφος
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)
[ᾰ], ὁ, A dyer of purple, Inscr. Delos 400.7 (ii B.C.), IGRom.4.816 (Hierapolis, πορφυραβ-), Ath.13.604b.
German (Pape)
[Seite 686] ὁ, Purpurfärber; Ath. XIII, 604 b; Poll. 7, 169.
Greek (Liddell-Scott)
πορφῠροβάφος: ὁ βάπτων εἰς πορφυροῦν χρῶμα τὰ ὑφάσματα, Ἀθήν. 604Β.
Greek Monolingual
ὁ, Α
τεχνίτης της βαφής πορφυρών υφασμάτων.
[ΕΤΥΜΟΛ. < πορφύρα + -βάφος (< βαφή < βάπτω), πρβλ. υδρο-βάφος].