βοσκέσκοντο

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

Source

French (Bailly abrégé)

3ᵉ pl. impf. itér. Pass. de βόσκω.