Γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → The fool laughs even when there's nothing to laugh at
ἐπὶ: ὕφους, ἄτακτος, ἀκαλλώπιστος, Διον. Ἁλ. περὶ Θουκ. 23, κτλ. 3) ἄνευ κόσμου, ἐνδεής, τινί, Ξεν. Οἰκ. 11.9.