ἰσόπετρος
From LSJ
Ἡ δ' ἐμὴ ψυχὴ πάλαι τέθνηκεν, ὥστε τοῖς θανοῦσιν ὠφελεῖν → My soul died long ago so that I could give some help to the dead
English (LSJ)
ον,
A gloss on ἀντίπετρος, Sch.S.OC192.
German (Pape)
[Seite 1265] felsengleich, steinhart, Erkl. von ἀντίπετρος, Schol. Soph. O. C. 188.