8.4.5
प्रनिरन्तःशरेक्षुप्लक्षाम्रकार्ष्यखदिरपीयूक्षाभ्योऽसंज्ञायामपि
Operational rule vidhi
The न of वन , is replaced by ण , even when the compound is not a Name, when it is preceded by the words प्र , निर् , अन्तर , शर , इक्षु , प्लक्ष , आम्र , कार्ष्य , खदिर and पीयूक्षा.
Word by word (padaccheda)
Left context प्र- निर्- अन्तः- शर- इक्षु- प्लक्ष- आम्र- कार्ष्य- खदिर- पीयूक्षाभ्यः pañcamī · bahuvacanaRight context असंज्ञायाम् saptamī · ekavacanaIndeclinable अपि avyaya
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
- Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
Full reading
प्र-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The न of वन , is replaced by ण , even when the compound is not a Name, when it is preceded by the words प्र , निर् , अन्तर , शर , इक्षु , प्लक्ष , आम्र , कार्ष्य , खदिर and पीयूक्षा।
Thus प्रवणे यष्टम्; निर्वणे प्रतिधीयते, अन्तर्वणे, शरवणम्, इक्षुवणम्, प्लक्षवणम्, आम्रवणम्, कार्ष्यवणम्, खदिरवणम् and पीयुक्षावणम् ॥
The words प्रवणं and निर्वणं are प्रादिः compounds. अन्तर्वणं is an Avyayibhava in the sense of a case-affix. The rest are Genitive compounds.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.