Abbott-Smith Manual Greek Lexicon
σύν-ζυγος (G4805)
1 ** σύν-ζυγος (Rec. ουζ- ), or as WH, mg., Σύνζυγος, -ον ( συνζεύγνυμι ), [in Aq., Ez 23:21 * ;] a yoke fellow . Prob., as proper name, Σ. γνήσιε , genuinely Synzygus, S. properly so-called , Phl 4:3 (v. ICC , Lft., in l.; MM, xxiii).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain