γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → the fool laughs even when there's nothing to laugh at
P. and V. μανία, ἡ, ἀφροσύνη, ἡ, τὸ μανιῶδες; see madness.
folly: P. and V. μωρία, ἡ, ἄνοια, ἡ, ἀβουλία, ἡ, ἀσυνεσία, ἡ (Euripides, Fragment); see folly.