6.3.52
पादस्य पदाज्यातिगोपहतेषु
Operational rule vidhi
पद् is substituted for पाद before 1. आजि 2. आति 3. ग and 4. उपहत.
Word by word (padaccheda)
Target पादस्य ṣaṣṭhī · ekavacanaWord Right context आजि- आति- ग- उपहतेषु saptamī · bahuvacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Word Case not marked in the source data.
- 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
पादस्य आजि-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
पद् is substituted for पाद before 1. आजि 2. आति 3. ग and 4. उपहत।
Thus पदाजिः = पादाभ्यामजति; पदातिः = पादाभ्यामतति ॥ आजिः and आतिः are formed by इण् from अज् and अत् (Unadi IV. 131), and irregularly अज् is not changed to वी though required by 2.4.56; before this affix. So also पदगः = पादाभ्यां गच्छति; पदोपहतः = पादेनोपहतः ॥ पाद belongs to Vrishadi class 6.1.203 and has therefore acute on the first syllable, the पद् substitute however has acute on the final, only in the उपदेश 6.1.171, therefore in पदोपहतः, पद् retains its accent 6.2.48, and it becomes acute on the final. While पदाजिः, पदातिः and पदगः have acute on the final 6.1.223 and krit-accent)).
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.