5.4.130
ऊर्ध्वाद्विभाषा
Operational rule vidhi
The substitution of ज्ञु for जानु when the word ऊर्धव precedes it.
Word by word (padaccheda)
Left context ऊर्ध्वाद् pañcamī · ekavacanaSubstitute / term 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
ऊर्ध्वाद्
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The substitution of ज्ञु for जानु when the word ऊर्धव precedes it.
Thus ऊर्ध्वे जानुनी अस्य = ऊर्ध्वजानुः or ऊर्ध्वज्ञुः ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.