yeug- / Indo-European roots
Examples of words with the root yeug-: -zygous, adjoin, adjust, azygos, conjoin, conjugate, enjoin, injunction, join, joust, jugate, jugular, jugum, junction, juncture, junta, juxtapose, subjoin, subjugate, syzygy, viga, yoga, yoke, Yuga, zeugma, zygo-, zygoma, zygote.
▲ Derivatives include yoke, jugular, adjust, junta, yoga.
I. Zero-grade form *yug-.
1. Suffixed form *yug-o-. a. yoke from Old English geoc, yoke, from Germanic *yukam; b. jugate, jugular, jugum; conjugate, subjugate from Latin iugum, yoke; c. zygo-, zygoma, zygote, -zygous; azygos, syzygy from Greek zugon, yoke, and zugoun, to join; d. Yuga from Sanskrit yugam, yoke.
2. Suffixed (superlative) form *yug-isto-. jostle, joust; adjust, juxtapose, juxtaposition from Latin iūxtā, close by, perhaps from *iugistā (viā), "on a nearby (road)"
3. Nasalized zero-grade form *yu-n-g-. join, joinder, joint, jointure, junction, juncture, junta; adjoin, conjoin, conjugal, conjunct, enjoin, injunction, rejoin1, rejoinder, subjoin from Latin iungere, to join.
II. Suffixed form *yeug-mn̥. zeugma from Greek zeugma, a bond.
III. Suffixed o-grade form *youg-o-. yoga from Sanskrit yogaḥ, union.
[Pokorny 2. i̯eu- 508.]