peior

From LSJ

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

Source

Latin > English (Lewis & Short)

pējor: us, v. 1. malus.

Latin > German (Georges)

pēior, s. 1. malus.