FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

zugos ζυγός — dzoo-gos' — from the root of zeugnumi (to join, especially by a "yoke"); a coupling, i.e. (figuratively) servitude (a law or obligation); also (literally) the beam of the balance (as connecting the scales):--pair of balances, yoke.