παραπλευρίδια
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)
τά,
A covers for the sides of war-horses, X.Cyr.6.4.1, Arr.Tact.4.1.
German (Pape)
[Seite 494] τά, die Bedeckung der Seiten an den Streitrossen, Xen. Cyr. 6, 4, 1; vgl. Poll. 2, 167.