συμπολίτευσις
From LSJ
ἐν δὲ τοῖς φυσικοῖς ἀεὶ οὕτως, ἂν μή τι ἐμποδίσῃ → in natural products the sequence is invariable, if there is no impediment | now with that which is natural it is always thus if there is no impediment
English (LSJ)
-εως, ἡ, fellow-citizenship, IG42(1).59.12 (Epid., iii B.C.).