Proto-Indo-European Roots

Root/Stem: *yug-
Meaning:  to bind, to harness
Cognates:
Hellenic Greek dzugon 'yoke'
Italic Latin jungere 'to bind', jugum 'yoke'
Celtic Common Celtic *con-yungi- 'to bind', *yougo- 'yoke' >
Irish & Scottish cuing 'yoke', Welsh iau 'yoke', Old Welsh iou, Old Cornish ieu, Breton geo, ieo, Gaulish Ver-iugo-dumnus (a personal name)
Indic Sanskrit yugam 'yoke', yuñjati 'binds'
Iranian Avestan yaoj-, yuj- 'to harness', Persian jug
Anatolian Hittite iukan 'yoke'
Armenian Armenian luc 'yoke'
Balkan
Germanic Common Germanic *jaukiz 'yoke' >
Gothic juk 'yoke', Old English géoc, Old Icelandic eykr, Old Saxon uk, Old High German juh
Baltic Lithuanian jungti 'to harness', jungas 'yoke'
Slavic Common Slavic *jïgo 'yoke' >
Russian & Bulgarian & Polish & Slovene igo, Kashubian jigoe, Polabian jeigü
Notes: Another term from the cattle breeding lexicon of ancient Indo-Europeans. This word was used only for harnessing cattle into the yoke, so the very word 'yoke' is a clear derivative. We can even say for sure that it was neuter in gender in Indo-European: *yugom