स्वपो नन्

Operational rule vidhi

The affix नन् comes under similar circumstances after the verb स्वप् 'to sleep'.

Word by word (padaccheda)

Left context स्वपः pañcamī · ekavacanaSubstitute / term नन् prathamā · ekavacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.

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Full reading

स्वपः नन्

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

Commentary

The affix नन् comes under similar circumstances after the verb स्वप् 'to sleep'.
The final न् is indicatory and regulates the accent 6.1.197; as स्वप्नः 'a dream'.

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