ShabdaShabda (शब्द, ), is the Sanskrit word for "speech sound". In Sanskrit grammar, the term refers to an utterance in the sense of linguistic performance. In classical Indian philosophy of language, the grammarian Katyayana stated that shabda ("speech") is eternal (nitya), as is artha "meaning", and that they share a mutual co-relation. According to Patanjali, the permanent aspect of shabda is ("meaning"), while dhvani ("sound, acoustics") is ephemeral to shabda.
YāskaYāska 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.
UpamāṇaUpamāṇa (Sanskrit: "comparison"), upamana in Hinduism, is a pramāṇa, or means of having knowledge of something. Observance of similarities provides knowledge of the relationship between the two. It also means getting the knowledge of an unknown thing by comparing it with a known thing. For example, assume a situation where a man has not seen a gavaya or a wild cow and doesn't know what it is. A forester told him that a wild cow is an animal like a country cow but she is more furious and has big horn in her forehead.
