Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Sanskrit grammatical tradition of vy kara a (Devanagari) is one of the six Vedanga disciplines. It has its roots in late Vedic India, and includes the famous work, A dhy y , of P ini (ca. 4th century BCE). The impetus for linguistic analysis and grammar in India originates in the need to be able to obtain a strict interpretation for the Vedic texts. The work of the very early Indian grammarians has been lost; for example, the work of Sakatayana (roughly 8th c. BCE) is known only from cryptic references by Yaska (ca. 6th-5th c. BCE) and Panini. One of the views of Sakatayana that was to prove controversial in coming centuries was that most nouns are etymologically derivable from verbs.