Where does “niδān” come from?

niδān (Parthian) comes from Proto-Iranian ni-dāna-, from Proto-Iranian ni-, from Proto-Indo-Iranian ní, from Proto-Indo-European ni — down.

Ancestry of “niδān”, step by step

StepLanguageWordMeaning
1Proto-Iranianni-dāna-—
2Proto-Iranianni-down
3Proto-Indo-Iraniannídown, downwards; in, into
4Proto-Indo-Europeannidown

Words derived from “niδān”

Every word from Proto-Indo-European ni →Every word from Proto-Indo-Iranian ní →Every word from Proto-Iranian ni- →