συμβιωτής
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
οῦ, ὁ,
A one who lives with, companion, partner, prob. l. in Eup.448, cf. Plb.8.10.3, Cic.Fam.9.10.2. II esp. of the confidants of the Roman Emperors, etc., Plu.2.207c, Jul. Caes.326b; σ. τοῦ βασιλέως Βαβυλῶνος LXX Bel 2.
German (Pape)
[Seite 978] ὁ, der mit Andern zusammen od. in Gesellschaft Lebende; Pol. 8, 12, 3; καὶ ἑταῖρος, Plut. Cat. min. 35.