Where does “ニル” come from?

ニル (Japanese) comes from English nil, from Latin nīl, from Sanskrit नील, from Proto-Indo-European neyH- — to lead.

ニル (Japanese): nil

Definitions

Step	Language	Word	Meaning
1	English	nil	Nothing; zero; No, not any
2	Latin	nīl	—
3	Sanskrit	नील	of a dark color
4	Proto-Indo-European	neyH-	to lead