Where does “ni-waid-” come from?

ni-waid- (Middle Iranian) comes from Proto-Iranian ni-, from Proto-Indo-Iranian ní, from Proto-Indo-European ni — down.

Ancestry of “ni-waid-”, step by step

ni-waid- traces back through two separate lines of ancestry.

via Proto-Iranian ni-

StepLanguageWordMeaning
1Proto-Iranianni-down
2Proto-Indo-Iraniannídown, downwards; in, into
3Proto-Indo-Europeannidown

via Proto-Iranian waid-

StepLanguageWordMeaning
1Proto-Iranianwaid-to find; to know
2Proto-Indo-Iranianwayd-to know; to find
3Proto-Indo-Europeanweyd-to see
Every word from Proto-Indo-European ni →Every word from Proto-Indo-Iranian ní →Every word from Proto-Iranian ni- →
ni-waid- — Etymology, Origin & Word History | Etymology Explorer