μεσεγγύημα
From LSJ
ἀκίνδυνοι δ' ἀρεταὶ οὔτε παρ' ἀνδράσιν οὔτ' ἐν ναυσὶ κοίλαις τίμιαι → but excellence without danger is honored neither among men nor in hollow ships
English (LSJ)
ατος, τό,
A money or pledge deposited with a third party, X.ap.Poll.8.28, Aeschin.3.125, Hyp.Fr.254, App.BC2.19, BGU592ii9 (ii A.D.).