ἀδελφιδοῦς

From LSJ

τὸ γὰρ ὑπέγγυον δίκᾳ καὶ θεοῖσιν → liability to human and divine justice

Source

German (Pape)

[Seite 32] ὁ, Neffe, Bruder- od. Schwestersohn, 'Thuc. u. Folgde.

French (Bailly abrégé)

v. ἀδελφιδέος.

Russian (Dvoretsky)

ἀδελφιδοῦς: стяж. к ἀδελφιδεός.

Lexicon Thucydideum

filius fratris vel sororis, son of a brother or sister, 2.101.6. 4.101.5.