Ἀμφιπολίτης
From LSJ
Ὁ δὲ μὴ δυνάμενος κοινωνεῖν ἢ μηδὲν δεόμενος δι' αὐτάρκειαν οὐθὲν μέρος πόλεως, ὥστε ἢ θηρίον ἢ θεός → Whoever is incapable of associating, or has no need to because of self-sufficiency, is no part of a state; so he is either a beast or a god
Spanish (DGE)
-ου, ὁ anfipolita ét. de Anfípolis, Th.4.104, D.1.5, Call.Epigr.24.1, Arist.Pol.1303b2.