2.3.47
सम्बोधने च
Operational rule vidhi
And when the sense is that of addressing, the 1st case-affix is used.
Word by word (padaccheda)
Right context सम्बोधने saptamī · ekavacanaIndeclinable च avyaya
- Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
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Full reading
सम्बोधने च
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
And when the sense is that of addressing, the 1st case-affix is used.
Ex. हे राम 'O Ram' हे रामौ, हे रामाः ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.