αὐτάδελφος
διὸ δὴ πᾶς ἀνὴρ σπουδαῖος τῶν ὄντων σπουδαίων πέρι πολλοῦ δεῖ μὴ γράψας ποτὲ ἐν ἀνθρώποις εἰς φθόνον καὶ ἀπορίαν καταβαλεῖ → And this is the reason why every serious man in dealing with really serious subjects carefully avoids writing, lest thereby he may possibly cast them as a prey to the envy and stupidity of the public | Therefore every man of worth, when dealing with matters of worth, will be far from exposing them to ill feeling and misunderstanding among men by committing them to writing
English (LSJ)
ον (η, ον Sch.E.Hec.944)
A brother's or sister's, αἷμα A.Th.718, Eu.89; αὐ. Ἰσμήνης κάρα S.Ant.1. II Subst., one's own brother or sister, ib.503,696:—later αὐτ-αδέλφη, ἡ, Sch.E.Ph.135.
Greek (Liddell-Scott)
αὐτάδελφος: -ον, ἀδελφικός, ὁ ἀνήκων εἰς αὐτὸν τὸν ἀδελφόν, ἀλλ΄ αὐτάδελφον αἷμα δρέψασθαι θέλεις; Αὐσχύλ. Θήβ. 718, Εὐμ. 89· ὦ κοινὸν αὐτάδελφον Ἰσμήνης κάρα Σοφ. Ἀντ. 1. ΙΙ. ὡς οὐσιαστ. ὁ καθ΄ αὑτὸ ἀδελφός, ὁ ἐκ τῶν αὐτῶν γονέων ἀδελφὸς ἢ ἀδελφή, αὐτόθι 503, 696.