Nirukta, Phonetic Variants, and Vedic Dhātu–Svara Taxonomy
अष्टादश राप्रभृतयः परस्मैपदिनः स्मृताः । इङ्ङात्मनेपदी प्रोक्तो धातुर्नारद केवलः ॥ ४१ ॥
aṣṭādaśa rāprabhṛtayaḥ parasmaipadinaḥ smṛtāḥ | iṅṅātmanepadī prokto dhāturnārada kevalaḥ || 41 ||
十八个动词词根——以“rā-”为首的一组——被忆持为Parasmaipada(主动语尾)。而词根“iṅ”,那罗陀啊,被教示为唯独Ātmanepada。
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
It shows that disciplined Vedic knowledge—especially Vyākaraṇa (grammar)—is treated as a supporting limb of dharma and mokṣa, because precise language preserves correct understanding of śāstra.
Indirectly: by emphasizing correct grammatical tradition, it safeguards accurate recitation and comprehension of sacred texts that nourish bhakti, even though the verse itself is technical.
Vyākaraṇa: the rule-based classification of dhātus into parasmaipada and ātmanepada usage, including an example of a root taught as exclusively ātmanepada.