ἴων

From LSJ

εἰπὼν ἃ θέλεις, ἀντάκουε ἃ μὴ θέλεις → if you say what you want, hear in response what you don't want

Source

French (Bailly abrégé)

gén. pl. de ἴον;
gén. pl. de ἴος.