ἀθροιστός

From LSJ

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

Source

Spanish (DGE)

-ή, -όν reunido Hsch.s.u. ἁλεῖον ὕδωρ.