οὐ γὰρ ἂν τό γε πραχθὲν ἀγένητον θείη → since he cannot make what was done as though it had not come to pass
P. and V. μέγα, μέγιστα, Ar. and P. ὑπερφυῶς.
in an extraordinary degree: V. εἰς ὑπερβολήν; see hugely, excessively, vastly.