8.2.15
छन्दसीरः
Operational rule vidhi
In the छन्दस् (Vedas) व् is substituted for the म् of मत् after a अङ्ग (stem) ending in इ (or ई) or र्.
Word by word (padaccheda)
Right context छन्दसि saptamī · ekavacanaLeft context इरः pañcamī · ekavacana
- 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").
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
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Full reading
छन्दसि इरः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
In the छन्दस् (Vedas) व् is substituted for the म् of मत् after a अङ्ग (stem) ending in इ (or ई) or र्।
To take some examples of a stem ending in इ, as त्रिवती याज्यानुवाक्या भवति; हरिवो मे दनं त्वा; अधिपति वती जुहोति; चतुरग्निवानिव; आरेवानेतु मा विशत् (आरेवान् from रयि with vocalisation). सरस्वतीवान्, भारतीवान्, दधीवांश्चरुः ॥ As all rules have optional force in the Chhandas, we have no change here सप्तर्षिमन्तम्, ऋषिमान्, ऋतीमान् सूर्यं ते द्यावापृथिवीमन्तं ॥ Of stems ending in र we have गीर्वान्, धूर्वान्, आशीर्वान् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.