5.4.153
नद्यृतश्च
Operational rule vidhi
The affix कप् is added to a बहुव्रीहि समास the last member of which is a feminine word ending in long ई or ऊ defined as नदी words or which ends in a short ऋ.
Word by word (padaccheda)
Left context नद्यृतः 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
नद्यृतः च
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix कप् is added to a बहुव्रीहि समास the last member of which is a feminine word ending in long ई or ऊ defined as नदी words or which ends in a short ऋ।
The word नदी is defined in 1.4.3. Thus बहुकुमारीको देशः (बह्व्यः कुमर्योऽस्मिन्देशे), बहुब्रह्मबन्धूकः ॥ बहुकर्तृकः ॥ The त in ऋत् is for the sake of euphony.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.