Vyākaraṇa — grammar, and Pāṇini

Pāṇini's Aṣṭādhyāyī — 'eight chapters' — describes the entire Sanskrit language in 3,959 rules of extreme compression, arranged so that rules interact by explicit precedence. It is not a description of grammar; it is a machine that produces correct forms.

What makes it extraordinary

• It uses metarules (paribhāṣā) that govern how the other rules apply — a formal system with its own operating instructions.
• It uses a technical shorthand (the Śiva Sūtras, and the pratyāhāra abbreviations) that compresses classes of sounds into single syllables.
• Rule ordering, conflict resolution and exception handling are all explicit — the principle that the more specific rule overrides the general one is stated as a rule.
• It generates rather than merely describes: given a root and an intention, the rules yield the correct form.
• Its structure is close enough to a formal grammar that twentieth-century linguists and computer scientists studied it directly; the term 'Backus–Naur form' has been argued to describe something Pāṇini did first.

Three works form the 'great triad' of the grammatical tradition: Pāṇini's Aṣṭādhyāyī, Kātyāyana's Vārttika (critical notes on it), and Patañjali's Mahābhāṣya (the great commentary on both). Vyākaraṇa is also a full philosophy of language — Bhartṛhari's Vākyapadīya argues that reality itself is of the nature of the word, śabda-brahman.

॥ ❖ ॥

Last revised 2026-08-16. Corrections are welcome — see how this site is written.