Latin word iungere comes from Proto-Indo-European *yewg-, Proto-Indo-European - -né-, and later Proto-Indo-European *yunégti (To be joining.)

Detailed word origin of iungere

Dictionary entry	Language	Definition
*yewg-	Proto-Indo-European (ine-pro)
- -né-	Proto-Indo-European (ine-pro)
*yunégti	Proto-Indo-European (ine-pro)	To be joining.
*jungō	Proto-Italic (itc-pro)	To join. To yoke.
iungere	Latin (lat)

Words with the same origin as iungere