ὄχανον
From LSJ
οὐ γὰρ ἂν τό γε πραχθὲν ἀγένητον θείη → since he cannot make what was done as though it had not come to pass
English (LSJ)
τό, (ἔχω A)
A holder of a shield, i.e. a bar or band fastened crosswise on the under side of the shield, through which the bearer passed his arm, Anacr.91, Hdt.2.141, Aen.Tact.29.12; invented by the Carians acc. to Hdt.1.171.