συνέταιρος
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)
ὁ,
A companion, partner, comrade, Sapph.Supp.20a5, Hdt.7.193, LXX Jd.15.2, Da.2.17, Supp.Epigr.1.572.7 (Egypt): fem. συνεταιρ-ίς, ίδος, Erinn. 5.7, LXX Jd.11.37, Ph.1.194.