3.1.110
ऋदुपधाच्चाकॢपिचृतेः
Operational rule vidhi
After the verbs having the penultimate short ऋ , the affix क्यप् is used, with the exception of the verbs कॢप् 'to be able' and वृत् 'to hurt'.
Word by word (padaccheda)
Left context ऋदुपधात् pañcamī · ekavacanaIndeclinable च avyayaLeft context अकॢपिचृतेः pañcamī · ekavacana
- 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
ऋदुपधात् च अकॢपिचृतेः
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 having the penultimate short ऋ , the affix क्यप् is used, with the exception of the verbs कॢप् 'to be able' and वृत् 'to hurt'.
Thus वृत् + क्यप् = वृत्यम्; so also वृध्यम्. But क्लृप् and चृत् will form कल्प्यम्, and चर्त्यम्.
Why have we used the letter त् in ऋत् ? It is to indicate that short ऋ
is meant and not long ॠ 1.1.70. Therefore the root कॄत् will take ण्यत् and form कीर्त्यम्.
Vart:- The root सृज् takes the affix ण्यत् when compounded with the word पाणि. Thus पाणिसर्ग्या रज्जुः 'a rope'.
Vart:- The root सृज् when preceded by both सम् and अव takes ण्यत् as समवसर्ग्या.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.