Where does “մերձի” come from?

մերձի (Old Armenian) comes from Old Armenian մերձ, from Old Armenian -ան, from Proto-Indo-European -nós — Creates verbal adjectives from roots.

Ancestry of “մերձի”, step by step

Step	Language	Word	Meaning
1	Old Armenian	մերձ	near, nigh, next, close to, contiguous; near,...
2	Old Armenian	-ան	found mainly in nouns; instrument-suffix;...
3	Proto-Indo-European	-nós	Creates verbal adjectives from roots

մերձի — Etymology, Origin & Word History | Etymology Explorer