κατεγγύη
From LSJ
Πυλάδη, σε γὰρ δὴ πρῶτον ἀνθρώπων ἐγὼ πιστὸν νομίζω καὶ φίλον ξένον τ' ἐμοί → Pylades for indeed I consider you, foremost among men, loyal and kind and a host to me (Euripides' Electra 82-83)
English (LSJ)
ἡ,
A giving of security, D.25.60.
German (Pape)
[Seite 1393] ἡ, die Verbürgung, Bürgschaft, ἐμπεσόντος εἰς τὸ δεσμωτήριον ἀνθρώπου πρὸς κατεγγύην Dem. 25, 60, weil er keine Bürgschaft stellen konnte.