8.2.48
अञ्चोऽनपादाने
Operational rule vidhi
The निष्ठा त is changed to न after अञ्च् but not when it is in connection with an Ablative -5th case.
Word by word (padaccheda)
Left context अञ्चः pañcamī · ekavacanaRight context अनपादाने 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
अञ्चः अनपादाने
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The निष्ठा त is changed to न after अञ्च् but not when it is in connection with an Ablative -5th case.
Thus समक्नौ शकुनेः पादौ = सङ्गतौ; तस्मात् पशवो न्यक्नाः ॥
Why do we say 'when not in construction with an Ablative case'? Observe उदत्तमुदकं कूपात् = उद्धृतं 'drawn out'.
The word व्यक्तम् is from the root अञ्जू व्यक्तिम्रक्षण कान्तिगतिषु, and not from the root अञ्च्; and hence the Nishtha is not changed.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.