पीलाया वा

Operational rule vidhi

To indicate the meaning of 'his/her offspring', the word पीला gets the अण्-प्रत्यय optionally.

Word by word (padaccheda)

Left context पीलायाः pañcamī · ekavacanaIndeclinable वा avyaya

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
Indeclinable An avyaya such as च "and", वा "optionally", न "not".

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Full reading

पीलायाः वा

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

The affix अण् comes optionally after the word पीला in denoting a descendant.
The word पीला being the name of a female would have taken अण् by 4.1.113; but this अण् would have been prohibited by 4.1.121 as it is a dissyllabic feminine word. Hence the necessity of the present sutra. Thus पैलः or पैलेयः 'son of Pila.'

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.