Where does “iugum” come from?

iugum (Latin) comes from French joug, from Middle French joug, from Old French jug, from Latin jugum, from Proto-Italic jugom, from Proto-Indo-European yugóm, from Proto-Indo-European yewg- — to join, to yoke, to tie together.

iugum (Latin): yoke or collar; a team of oxen; horizontal beam...