ἠθικόν
From LSJ
καὶ κεραμεὺς κεραμεῖ κοτέει καὶ τέκτονι τέκτων, καὶ πτωχὸς πτωχῷ φθονέει καὶ ἀοιδὸς ἀοιδῷ → and potter is ill-disposed to potter, and carpenter to carpenter, and the beggar is envious of the beggar, the singer of the singer
Russian (Dvoretsky)
ἠθικόν: τό учение о нравственности Diog. L.: τὰ ἠθιχά Arst., Plut. учение о нравах или нравственности, этика.