σύνδουλος
From LSJ
English (LSJ)
ὁ, ἡ,
A fellow-slave, masc., Id.Ion 1109, Ar.Pax745 (anap.), Theopomp.Com.32.8, Lys.Fr.331 S., Herod.5.56, Ev.Matt. 18.29, etc.; fem., Hdt.2.134, E.Med.65, etc.; also fem. συνδούλη, Hdt.1.110, Babr.3.6. 2 metaph. in NT, Ep.Col.1.7, Apoc.6.11, al. (The statement of Moeris p.273 P., ὁμόδουλος Ἀττικῶς, σύνδουλος Ἑλληνικῶς, is incorrect: Poll.3.82 distinguishes ς. 'slave of the same master' fr. ὁμόδουλος 'companion in slavery'.)
German (Pape)
[Seite 1009] mitdienend, Mitsklave; Eur. Ion 1109; Ar. Pax 729; Her. öfter, auch ἡ σύνδουλος, Mitsklavinn, 2, 134.