लिपिसिचिह्वश्च

Operational rule vidhi

For the verb roots लिप् , सिच् and ह्वे , the च्लि-प्रत्यय is converted to अङ्.

Word by word (padaccheda)

Left context लिपि- सिचि- ह्वः pañcamī · ekavacanaIndeclinable 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.
Indeclinable An avyaya such as च "and", वा "optionally", न "not".

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Full reading

लिपि-सिचि-ह्वः 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 verbs लिप् 'to paint', सिच् 'to sprinkle' and ह्वे 'to call', अङ् is the substitute of च्लि when लुङ् (Aorist) follows signifying the agent.
Thus अलिपत् 'he painted or wrote'; असिचत्, 'he sprinkled; and आहूत् 'he called or challenged'.

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