μητράδελφος
From LSJ
Ἐχθροὺς ἀμύνου μὴ ‘πὶ τῇ σαυτοῦ βλάβῃ → Ulciscere hostem, non tamen damno tuo → Die Feinde wehre ohne Schaden für dich ab
English (LSJ)
[ᾰδ], Dor. ματρᾰδελφεός, Pi.P.8.35: ὁ and ἡ:—
A mother's brother or sister, uncle or aunt, BGU 1158.3, Poll.3.22.
German (Pape)
[Seite 179] ὁ, u. ἡ, Mutterbruder, Mutterschwester, Oheim, Base, Poll. 3, 22.