तच्चतुर्विधं नामाख्यातोपसर्गनिपाताश्चेति ॥ कZ_०२.१०.१५ ॥
tac caturvidhaṃ nāmākhyātopasarganipātāś ceti
That (word) is of four kinds: noun (nāma), verb (ākhyāta), preverb/prefix (upasarga), and particle (nipāta).
It enables systematic training and consistent drafting, reducing interpretive disputes in commands, contracts, and accounts.