7.3.113
याडापः
Operational rule vidhi
A ङित्-प्रत्यय that comes after an आबन्त word get a याट् आगम.
Word by word (padaccheda)
Substitute / term याट् prathamā · ekavacanaLeft context आपः pañcamī · ekavacana
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
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Full reading
याट् आपः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The augment याट् is added to the case-endings of the Dative -4th Case, Ablative -5th case and Genitive 6th-Case singular after a feminine अङ्ग (stem) ending in आ।
As खट्वायै, बहुराजायै, कारीषगन्ध्यायै, खट्वायाः, बहुराजायाः, कारीषगन्ध्यायाः ॥ But in the compound अतिखट्व, (from खट्वामतिक्रान्तः), this rule does not apply, on the maxim ङ्याब् ग्रहणेऽदीर्घः as the आ has been shortened here. Even when the word अतिखट्व assumes the form अतिखट्वा in the Dative by 7.3.102, the affix does not take the augment याट्, because this long आ is a lakshanika आ only, while the आ of the sutra is a pratipadokta (लक्षणप्रतिपदोक्तयोः प्रतिपदस्यैव) ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.