7.1.5
आत्मनेपदेष्वनतः
Operational rule vidhi
The झकार of the आत्मनेपदी प्रत्यय that follows an अनदन्त अङ्ग gets the 'अत्' आदेश.
Word by word (padaccheda)
Right context saptamī · bahuvacanaLeft context अनतः pañcamī · ekavacana
- 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").
- 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
अनतः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
अत् is always the substitute of झ in the आत्मनेपद when it is not preceded by a verbal अङ्ग (stem) ending in अ।
Thus चिन्वते, चिन्वताम्, अचिन्वत; लुनते, लुनताम्, अलुनत ॥ Why in the Atmanepada? Observe चिन्वन्ति, लुनन्ति ॥ Why "when not preceded by an अ"? Observe च्यवन्ते, प्लवन्ते, in which, though the roots are च्यु and प्लु, they assume the form च्यव and प्लव when the Vikarana शप् is added; the vikarana is added first, because it is nitya; and then the substitution of अन्त or अत for झ, as the case may be. The word अनतः qualifies झ, the झ should be immediately preceded by a stem ending in a non-अ; if some other letter intervenes, the rule will not apply. Thus from शी - शयान्तै, here between शी and झ, intervenes the augment आट्, therefore झ is not preceded by a stem ending in non अ, but by आट् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.