The region where these differences first become noticeable lies just south of a chain of mountains called the Vindhya.
CNN: Center Cut
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These displaced people acquired a distinct name -- "Dravidian" -- derived from a Sanskrit word for people living south of the Vindhya.
CNN: Center Cut
3.
Derived from the Sanskrit root "bid, " which means "to divide, " the Vindhya traverses the center of the country from east to west, forcing a natural barrier between northern and southern India.