Yāska was an ancient Indian grammarian and linguist [est. 7th–5th century BCE(disputed)]. Preceding Pāṇini [est. 7th–4th century BCE(disputed)], he is traditionally identified as the author of Nirukta, the discipline of "etymology" (explanation of words) within Sanskrit grammatical tradition and the Nighantu, the oldest proto-thesaurus in India. Yaska is widely regarded as the precursive founder of the discipline of what would become etymology in both the East and the West. "यास्काचार्यो यस्कस्य अपत्यं स्यात्" The name Yaaska is probably a patronymic name meaning of Yaska यस्क. It is uncertain however who Yaska यस्क could have been."अपि पाणिनीयदृश्यते" The patronymic of Yaska is also seen in Panini's great work: The Astadhyayi (See Kashika commentary on Sutra फक्फिञोरन्यतरस्याम्). The list