συνάδελφος
From LSJ
Βιοῦν ἀλύπως θνητὸν ὄντ' οὐ ῥᾴδιον → Mortalis ullus vix sit exsors tristium → Schwer ist's für Sterbliche zu leben ohne Leid
English (LSJ)
[ᾰ], ον,
A one that has a brother or sister, opp. ἀνάδελφος, X.Mem.2.3.4. II member of an association, PMasp.2.11 (vi A.D.).
German (Pape)
[Seite 996] Geschwister habend, Xen. Mem. 2, 3, 4.