ἤθησις

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

Click links below for lookup in third sources:

Full diacritics: ἤθησις	Medium diacritics: ἤθησις	Low diacritics: ήθησις	Capitals: ΗΘΗΣΙΣ
Transliteration A: ḗthēsis	Transliteration B: ēthēsis	Transliteration C: ithisis	Beta Code: h)/qhsis

English (LSJ)

-εως, ἡ, riddling, λίθων IG4.1485.124 (Epid.); prob. l. for ἤθισις, Arist.Pr.870b18.