शाकटायन

Shakatayana (; 814–760 BCE) was a Sanskrit grammarian, linguist, and Vedic scholar. He is known for his theory that all nouns are derived from a verbal root which contrasted to grammarian Pāṇini. He also posited that prepositions only have a meaning when attached to nouns or other words. His theories are presented in his work, Śākaṭāyana-śabdānuśāsana, which is not found in its entirety but referenced by other scholars such as Yāska and Pāṇini.