Nirukta, Phonetic Variants, and Vedic Dhātu–Svara Taxonomy
सुप्तिङुपग्रहलिंगनराणां कालहलूचूस्वरकर्तृयडां च । व्यत्ययमिच्छति शास्रकृदेषां सोऽपि च सिद्ध्यति बाहुलकेन ॥ ८ ॥
suptiṅupagrahaliṃganarāṇāṃ kālahalūcūsvarakartṛyaḍāṃ ca | vyatyayamicchati śāsrakṛdeṣāṃ so'pi ca siddhyati bāhulakena || 8 ||
সুপ্ (নামবিভক্তি), তিঙ্ (ক্রিয়াপ্রত্যয়), উপগ্রহ (উপসর্গ), লিঙ্গ ও নর/কর্তা, এবং কাল, হ-লু-চূ বর্ণ, স্বর, কর্তৃ ও যড্—এগুলির মধ্যে শাস্ত্রকার যদি ব্যত্যয় চান, তবে বহুল প্রচলনের বলেই তাও সিদ্ধ হয়।
Sanatkumara (teaching Narada in a Vedanga/śāstra context)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: none
It frames śāstra as both rule-governed and usage-aware: disciplined learning (especially Vedāṅgas like Vyākaraṇa and Śikṣā) supports clarity in Vedic study, which in turn aids right understanding on the path of dharma and mokṣa.
Indirectly: accurate speech, chanting, and comprehension depend on grammar and accent; such correctness strengthens mantra-recitation and scriptural hearing (śravaṇa), which are foundational supports for sustained Viṣṇu-bhakti even when the verse itself is technical.
Vyākaraṇa and Śikṣā: it notes that grammatical authorities may allow substitutions and irregular forms, and that these can be accepted when backed by prevalent usage (bāhulaka), including matters of endings (suP/tiṅ) and Vedic accent (svara).