ἀδελφιδῆ
From LSJ
νᾶφε καὶ μέμνασο ἀπιστεῖν → keep a clear head and remember not to believe a thing (Epicharmus fr. 250)
English (LSJ)
ἡ, Att contr. for ἀδελφιδέη,
A a brother's or sister's daughter, a niece, Ar.Nu.47, Lys.3.6. Hp.Epid.6.2.19, etc.
German (Pape)
[Seite 32] ἡ, Schwester- oder Brudertochter, Nichte Lys. 32, 5.
Greek (Liddell-Scott)
ἀδελφιδῆ: ἡ, Ἀττ. συνῃρ. ἀντὶ τοῦ ἀδελφιδέη, θυγάτηρ ἀδελφοῦ ἢ ἀδελφῆς, «ἀνεψιά», Ἀριστοφ. Νεφ. 47, Λυσίας 97. 2, κτλ.