2.4.69
उपकादिभ्योऽन्यतरस्यामद्वन्द्वे
Operational rule vidhi
After the words उपक etc. there is optionally लुक् elision of the गोत्र affix when the words take the plural whether they enter into द्वन्द compound or are used separately.
Word by word (padaccheda)
Left context उपक- आदिभ्यः pañcamī · bahuvacanaRight context अन्यतरस्याम् saptamī · ekavacanaRight context अ- saptamī · ekavacana
- 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").
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Full reading
उपक-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
After the words उपक etc. there is optionally लुक् elision of the गोत्र affix when the words take the plural whether they enter into द्वन्द compound or are used separately.
Of the words belonging to this list, three have already been enumerated in the group of Tika-kitavadi of the last sutra. The elision is invariable in the Dvandva compound of these three, but when used separately the elision is optional. As, उपकलमकाः, भ्रष्टककपिष्ठलाः, कृष्णाजिनकृष्णसुन्दराः. But the plurals of औपकायनयः, the Gotra-derivative of उपक 4.1.99 is उपकाः or औपकायमाः; of लामकायनः is लमकाः or लामकायनाः; of भ्रष्टकि is भ्राष्टकाः or भ्राष्टकयः. The plural of कापिष्ठलिः is कपिष्टलाः or कापिष्टलयः. The plural of कार्ष्णाजिनिः is कृष्णाजिनाः or कार्ष्णाजिनयः. The plural of कृष्णसुन्दरः is कृष्णसुन्दराः or कार्ष्णसुन्दरयः.
Of the rest of the words belonging to this group, there is option allowed, both when they occur in Dvandva compound or when used alone. They are as follow :
1. पण्डारक. 2. अण्डारक. 3. गडुक. 4. सुपर्यक. 5. सुषिष्ट. 6. मयूरकर्ण. 7. खारीजङ्घ. 8. शलाबल. 9. पतञ्जल. 10. कठेरणि. 11. कुपीतक. 12. काशकृत्स्न. 13. निदाघ. 14. कलशीकण्ठ. 15. दामकण्ठ. 16. कृष्णपिंगल. 17. कर्णक. 18. पर्णक. 19. जटिलक. 20. बधिरक. 21.जन्तुक. 22 अनुलोम. 23. अर्द्धपिंगलक. 24. प्रतिलोम. 25. प्रतान 26. अनभिहित. (27. चृडारक. 28. उदङ्क 29. सुधायुक. 30. अबन्धक. 31. पदञ्जल. 32. अनुपद. 33. अपजग्ध. 34. कमक. 35. लेखाभ्र 36. कमन्दक. 37. पिञ्चल. 38. मसूरकर्ण 39. मदाघ. 40. कदामत्त. 41. दामकण्ठ) ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.