Vid-root
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The root VID was uttered or spoken for millennia before the first written languages appeared. It is first recognized in Proto-Indo-Aryan studies as the root VID, meaning "to know", in Southwestern Asia.
"Sanskrit vid is not a word, like the Latin videre, but what we technically call a root that is a sort of grammatical abstraction from which verb forms are made by the application of certain rules." This according to Dr. Walter Maurer, Professor of Sanskrit, Department of Indo-Pacific languages, University of Hawaii at Manoa.
With the advent of written languages, including cuneiform and sanskrit, VID spread in many directions. To the east vid became "veda" meaning "knowledge" or even "sacred knowledge".
According to Carl W. Conrad, Department of Classics, Washington University (Emeritus), VID also migrated by "unmistakable affinity" to the west, where early Greeks used the root vid, and later video meaning "to know", and eventually to Latin "video" meaning "I see" or "I apprehend". The roots of VID are inextricably connected to "knowing".