Where does “នីល” come from?

នីល (Khmer) comes from French Nil, from Ancient Greek νεῖλος, from Arabic نِيل, from Persian نیل, from Arabic نيل, from Middle Persian 𐭭𐭩𐭫, from Sanskrit नील, from Proto-Indo-European neyH- — to lead.

Ancestry of “នីល”, step by step

Step	Language	Word	Meaning
1	French	Nil	—
2	Ancient Greek	νεῖλος	river valley
3	Arabic	نِيل	indigo
4	Persian	نیل	indigo
5	Arabic	نيل	verbal noun of نَالَ; indigo; to colour indigo
6	Middle Persian	𐭭𐭩𐭫	indigo
7	Sanskrit	नील	of a dark color
8	Proto-Indo-European	neyH-	to lead

Every word from Proto-Indo-European neyH- →Every word from Sanskrit नील →Every word from Middle Persian 𐭭𐭩𐭫 →