A — 1: ζυγός
(Strong's #2218 — Noun Masculine — zugos — dzoo-gos' )

"a yoke," serving to couple two things together, is used (1) metaphorically, (a) of submission to authority, Matthew 11:29,30 , of Christ's "yoke," not simply imparted by Him but shared with Him; (b) of bondage, Acts 15:10; Galatians 5:1 , of bondage to the Law as a supposed means of salvation; (c) of bondservice to masters, 1—Timothy 6:1; (2) to denote "a balance," Revelation 6:5 . See BALANCE.

A — 2: ζεῦγος
(Strong's #2201 — Noun Neuter — zeugos — dzyoo'-gos )

"a pair of animals," Luke 14:19 . See PAIR.

B — 1: ἑτεροζυγέω
(Strong's #2086 — Verb — heterozugeo — het-er-od-zoog-eh'-o )

"to be unequally yoked" (heteros, "another of a different sort," and A, No. 1), is used metaphorically in 2—Corinthians 6:14 .