8.4.51
सर्वत्र शाकल्यस्य
Operational rule vidhi
According to शाकल्य, a यर् letter is never duplicated.
Word by word (padaccheda)
Indeclinable सर्वत्र avyayaTarget शाकल्यस्य ṣaṣṭhī · ekavacana
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
Full reading
सर्वत्र शाकल्यस्य
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
According to the opinion of शाकल्य , there is reduplication no where.
As अर्कः, मर्कः, ब्रह्मा, अपह्नुते ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.