Where does “მიტრა” come from?

მიტრა (Georgian) comes from Old Georgian მიტრაჲ, from Ancient Greek μίτρα, from Proto-Indo-European mey- — to strengthen; to bind; to change, exchange.

მიტრა (Georgian): mitre

Definitions

mitre

Ancestry of “მიტრა”, step by step

Step	Language	Word	Meaning
1	Old Georgian	მიტრაჲ	—
2	Ancient Greek	μίτρα	A metal guard worn round the waist; A maiden's...
3	Proto-Indo-European	mey-	to strengthen; to bind; to change, exchange

Every word from Proto-Indo-European mey- →Every word from Ancient Greek μίτρα →Every word from Old Georgian მიტრაჲ →