γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → the fool laughs even when there's nothing to laugh at
adv.
Ar. and P. γλισχρῶς.
Importunately: P. λιπαρῶς (Plat.).
Obstinately: Ar. and P. αὐθάδως.
