Where does “नीत” come from?

नीत (Hindi) comes from Sanskrit नीत, from Sanskrit नी, from Proto-Indo-European neyH- — to lead.

नीत (Hindi): led, guided

Definitions

Step	Language	Word	Meaning
1	Sanskrit	नीत	led, guided, brought; correct; well behaved,...
2	Sanskrit	नी	to guide, govern, direct
3	Proto-Indo-European	neyH-	to lead

नीत — Etymology, Origin & Word History | Etymology Explorer