Quick Definition
σύζυγος, ου, ὁ Adj a yoke-fellow, colleague
Strong's Definition
from 4801; co-yoked, i.e. (figuratively) as noun, a colleague; probably rather as a proper name; Syzygus, a Christian
KJV Usage: yokefellow
UBS Dictionary of the Greek New Testament
adjc. | -ου | ζυγός
1 σύζυγος seems to differ in meaning from συνεργός fellow worker (42.44) in implying a closer relationship with greater sharing of responsibility.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Mounce Concise Greek Dictionary
σύζυγος syzygos 1x
an associate, comrade, fellow laborer, or it could be the person’s name, Phil. 4:3*
Abbott-Smith Greek Lexicon
** 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).†
Moulton & Milligan — Vocabulary of the Greek NT
σύνζυγος, **yoke-fellow.” We can produce no evidence for σύνζυγος as a proper name, though its use as such in Phil 45 seems probable (WH marg.): see Kennedy ZG7 ad Δ For its use as an appellative Thieme (p. 32) cites the Magnesian graffito 328 (prob. i/A.pD.) σ]ύζυγοι Βαίβιος Κάλλιπος : cf. 321.
Liddell-Scott-Jones — Greek-English Lexicon
σύζυγος (suzugos) — yokefellow. σύζῠγ-ος, ον, yoked together, paired, united, especially by marriage, σ. ὁμαυλίαι wedded union, [Refs 4th c.BC+]; of fish, swimming in pairs, [Refs 4th c.BC+]
2. as substantive, feminine, wife, [Refs 5th c.BC+]; masculine, yoke-fellow, comrade, [NT+5th c.BC+]; brother, [Refs 5th c.BC+]; a gladiator's adversary, Herzog Koische Forschungen[Refs]; of things, ἀδελφὰ τούτοις καὶ σ. πεποιηκότες [Refs 1st c.AD+]
II. common, σ. πᾶσι πατρίς [Refs] adverb -γως conjointly with, τινι [Refs 2nd c.AD+]