χασματίας
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)
ου, ὁ, a kind of earthquake,
A which causes fissures in the earth, Arist.Mu.396a4 (v.l. ἱζηματίαι), Posidon. ap. D.L.7.154, Heraclit. All.38.
German (Pape)
[Seite 1340] ὁ, = Folgdm; Arist. de mund. 4, 30; D. L. 7, 154.
Greek (Liddell-Scott)
χασμᾰτίας: -ου, καὶ χασματικός, ὁ, εἶδος ἰσχυροῦ σεισμοῦ, καθ’ ὃν ἡ γῆ ῥήγνυται εἰς χάσματα, Ἀριστ. περὶ Κόσμου 4, 30, Διογέν. Λαέρτ. 7. 154, Ἡρακλείδ. Ἀλληγ. 38.