αὐτοσίδηρος
From LSJ
ἔνδον γὰρ ἁνὴρ ἄρτι τυγχάνει, κάρα στάζων ἱδρῶτι καὶ χέρας ξιφοκτόνους → yes, the man is now inside, his face and hands that have slaughtered with the sword dripping with sweat
English (LSJ)
[ῐ], Dor. -ᾱρος,, ον,
A of sheeriron, ἅμιλλα αὐ. 'with cold steel', E.Hel.356 (lyr.).
German (Pape)
[Seite 402] ganz von Eisen, Eur. Hel. 356.