8.3.110
न रपरसृपिसृजिस्पृशिस्पृहिसवनादीनाम्
Operational rule vidhi
The ष् substitution does not take place if र् follows the स् as well as in 1. सृप 2. सृज 3. स्पृश 4. स्पृह and 5. सवन etc.
Word by word (padaccheda)
Indeclinable न avyayaTarget रपर- सृपि- सृजि- स्पृशि- स्पृहि- सवनादीनाम् ṣaṣṭhī · bahuvacana
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
Full reading
न रपर-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The ष् substitution does not take place if र् follows the स् as well as in 1. सृप 2. सृज 3. स्पृश 4. स्पृह and 5. सवन etc.
Thus विस्रंसिकायाः काण्डं जुहोति ॥ The word विस्रंसिक is formed by the affix ण्वुल् 3.3.109, विस्रब्धः कथयति ॥ This word is from the root सृम्भु विश्वासे, the इट् is not added by 7.2.15 and the nasal is elided by 6.4.24. before the nisthha त ॥ सृप :- पुरा क्रूरस्य विसृपः ॥ The word विसृपः is formed by the affix कसुन् 3.4.17, सृज :- वाचो विसर्जनात् ॥ स्पृश :- विविस्पृशम् ॥ स्मृहि :- निस्पृहं कथयति ॥
The following is a list of सवनादि words :
1 सवने सवने, 2 सूते सूते, 3 सोमे सोमे, 4 सवनमुखे सवनमुखे, 5 किंसः किंसः (किंस्यतीति किंसः), 6 अनुसवनमनुसवनम्, 7 गोसनिं गोसनिम्, 8 अश्वसनिमश्वसनिम् ॥ In some books this is the list 9 सवने सवने, 10 सवनमुखे सवनमुखे, 11 अनुसवनमनुसवनम् (अनुसवने २),12 संज्ञायां बृहस्पतिसवः, 13 शकुनिसवनम्, 14 सोमे, सोमे, 15 सुते सुते (सूते २), 16 संवत्सरे संवत्सरे, 17 बिसं बिसम्, 18 किंसं किंसम् (किसं किसम्), 19 मुसलं मुसलम् 20 गोसनिम्, अश्वसनिम् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.