ἀδελφοπρεπῶς
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)
Adv.
A as befits a brother, LXX 4 Ma.10.12.
Greek (Liddell-Scott)
ἀδελφοπρεπῶς: ἐπίρρ., ὡς ἁρμόζει εἰς ἀδελφόν, Ἑβδ. (Μακκ. Δ΄, ι΄, 12).
Spanish (DGE)
adv. como conviene a un hermano LXX 4Ma.10.12.