νόμισις
From LSJ
ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → life is not worth living if you do not have at least one friend
English (LSJ)
εως, ἡ, (νομίζω)
A belief, opinion, ἡ ἀνθρωπεία τῶν ἐς τὸ θεῖον νόμισις the established belief about the Deity, Th.5.105; παρρησία τῆς ν. D.C.37.17.
German (Pape)
[Seite 261] ἡ, das herkömmliche Meinen, die herkömmliche Ansicht, der Brauch, ἔξω τῆς εἰς τὸ θεῖον νομίσεως, Thuc. 5, 105; vgl. Lob. Phryn. 351 und νομίζω.
