Nirukta

Before Yaska could get on with the work of explaining difficult Vedic words, he first had to answer an argument that the whole project was pointless. Yaska's own Nirukta preserves, in order to refute it, a position associated with an earlier authority named Kautsa, who reportedly held that Vedic mantras exist for their sound and their ritual efficacy alone, that their sequence and phonetic form is fixed by tradition for correct recitation, and that asking what a mantra actually means is a category mistake, like asking what a drumbeat means rather than simply performing it on cue. If Kautsa were right, an entire discipline of Vedic exegesis would have no proper object. Yaska rejected the argument point by point, holding instead that Vedic language, however archaic and however layered with ritual convention, remains ordinary language whose words trace back to verbal roots the same way any Sanskrit word does, so that meaning is recoverable in principle even where centuries of transmission have made a passage obscure. His method, worked out across the text, is to take a difficult word from the Nighantu, the older glossary he inherited, and derive it from a plausible root, explaining the semantic path from root sense to the word's attested Vedic use, an approach later grammarians criticized as sometimes speculative but that nonetheless established etymology as a legitimate and necessary tool of scriptural interpretation. The stakes were not merely academic: a Veda whose mantras carry no recoverable meaning cannot be argued about, applied to new rituals, or built upon by later schools such as Purva Mimamsa and Vedanta, and Nirukta's answer to Kautsa is what makes those later conversations about the Veda possible at all.

Yaska's own argument against Kautsa was not the end of the story. What happened to Yaska's method afterward is its own story, and it runs for roughly two thousand years to one of the most consulted Vedic commentaries ever written.

Panini's grammatical system, composed not long after or alongside Yaska's own work, shares Nirukta's basic assumption that Sanskrit words resolve into a verbal root plus formative elements, and the two disciplines developed in dialogue with each other as parallel tools for the same underlying language, one cataloguing how words are built, the other explaining what the building blocks originally meant. Later Vedic scholarship leaned on both. The clearest case is Sayana, a fourteenth century commentator working at the Vijayanagara court in South India, whose commentaries on the Rigveda and other Vedic texts became, and largely remain, the single most widely used premodern guide to what the Vedic hymns mean, still consulted by scholars today even where modern historical linguistics reconstructs a given word's history differently than Sayana does.

Sayana draws on Yaska's etymological glosses repeatedly and directly, following Nirukta's method of deriving an obscure Vedic word from a plausible root even when the derivation is speculative by modern standards, treating Yaska's own answer to Kautsa, that Vedic language remains recoverable ordinary language rather than sound without sense, as settled ground rather than a live question. An argument mounted in Nirukta's own opening chapters to defend the very possibility of Vedic exegesis became, by the time Sayana wrote some two thousand years later, simply the unstated assumption behind doing it.