5.1.40
पुत्राच्छ च
Operational rule vidhi
After the word पुत्र the affix छ (ईय) also comes, as well as यत् (य), in the above sense of 'a relation or a portent for the purpose of that'.
Word by word (padaccheda)
Left context पुत्रात् pañcamī · ekavacanaWord छ Indeclinable च avyaya
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
- Word Case not marked in the source data.
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
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Full reading
पुत्रात् छ च
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
After the word पुत्र the affix छ (ईय) also comes, as well as यत् (य), in the above sense of 'a relation or a portent for the purpose of that'.
The word पुत्र being a dissyllabic word would always have taken यत् by the last aphorism. This ordains छ also. Thus पुत्रस्य निमित्तं संयोग उत्पातो वा = पुत्रीयम् or पुत्र्यम् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.