ἀντιπεπόνθησις
From LSJ
ξένος ὢν ἀκολούθει τοῖς ἐπιχωρίοις νόμοις → as a foreigner, follow the laws of that country | when in Rome, do as the Romans do
English (LSJ)
εως, ἡ,
A reciprocal proportion, Nicom.Ar.1.7, Iamb.Comm.Math.7. v. ἀντιπεπονθός, ἀντιπάσχω
German (Pape)
[Seite 258] ἡ, das gegenseitige Verhältniß, Nicomach. arithm. 1, 7.