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ναικισσορεύοντας

Γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ -> The fool laughs even when there's nothing to laugh at
Menander

Frisk Etymological English

Meaning: ἐπίτηδες διασύροντας καὶ ἐξευτελίσαντας τινες δέ φασι ναικισσήρεις λέγεσθαι ἐπὶ τοῦ ἐμφαίνοντος ὁμολογεῖν καὶ ὁμολογοῦντος [Pherecr. 222], ἐπὶ τῶν κατεψευσμένων ἡ λέξις H. Cf. Photius s.v.
Origin: XX [etym. unknown]
Etymology: One tried to find ναίχι in the beginning.