Nirukta, Phonetic Variants, and Vedic Dhātu–Svara Taxonomy
सिद्धेद्वर्णागमाद्धंसः सिंहो वर्णविपर्ययात् । गूढोत्मा वर्णविकृतेर्वर्णनांशात्पृषोदरः ॥ ४ ॥
siddhedvarṇāgamāddhaṃsaḥ siṃho varṇaviparyayāt | gūḍhotmā varṇavikṛtervarṇanāṃśātpṛṣodaraḥ || 4 ||
‘Haṃsa’ (swan) becomes established by the addition of a letter; ‘siṃha’ (lion) is obtained by the transposition of letters. ‘Gūḍhātmā’ results from the alteration of letters, and ‘pṛṣodara’ from the partial loss of letters—thus are words accounted for by these grammatical operations.
Sanatkumara (in instruction to Narada on Vyakarana/Śabda-śāstra)
Vrata: none
Primary Rasa: adbhuta
Secondary Rasa: shanta
It shows that even subtle shifts in sound (varṇa) change meaning, training the seeker in precision of speech and understanding—disciplines valued in Mokṣa-dharma because correct knowledge depends on correct words.
Indirectly, it supports bhakti by emphasizing accurate recitation and comprehension of sacred names and mantras—since a small phonetic change can alter meaning, careful śabda-prayoga safeguards devotional practice.
Vyākaraṇa: derivation of words through operations like āgama (letter insertion), viparyaya (transposition), vikṛti (phonetic alteration), and nāśa/lopa (elision), illustrated with standard example-words.