ἕξεις

From LSJ

γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → the fool laughs even when there's nothing to laugh at

Source

French (Bailly abrégé)

2ᵉ sg. f. de ἔχω;
pl. de ἕξις.