Where does “զոյգ” come from?

զոյգ (Old Armenian) comes from Classical Syriac ܙܘܓܐ, from Ancient Greek ζυγόν, from Proto-Hellenic dzugón, from Proto-Indo-European yugóm, from Proto-Indo-European yewg- — to join, to yoke, to tie together.

զոյգ (Old Armenian): yoke, pair, couple; two- or four-horse chariot;...