Where does “miter” come from?

miter (Middle Dutch) comes from Old French mitre, from Latin mītra, from Ancient Greek μίτρα, from Proto-Indo-European mey- — to strengthen; to bind; to change, exchange.

Ancestry of “miter”, step by step

Step	Language	Word	Meaning
1	Old French	mitre	—
2	Latin	mītra	turban
3	Ancient Greek	μίτρα	A metal guard worn round the waist; A maiden's...
4	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 Latin mītra →