Where does “միեղջիւր” come from?

միեղջիւր (Old Armenian) comes from Old Armenian մի, from Proto-Indo-European meh₁ — prohibitive particle.

միեղջիւր (Old Armenian): unicorn

Definitions

Step	Language	Word	Meaning
1	Old Armenian	մի	one; first, firstly, in the first place; no, not,...
2	Proto-Indo-European	meh₁	prohibitive particle

միեղջիւր — Etymology, Origin & Word History | Etymology Explorer