7.4.26
च्वौ च
Operational rule vidhi
A long is substituted for the final vowel of the अङ्ग (stem) before the Adverbial affix च्वि -- अभूततद्भावे कृभ्वस्तियोगे सम्पद्यकर्तरि च्विः (5.4.50).
Word by word (padaccheda)
Right context च्वौ 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".
Dotted words are technical terms. Hover or tap one to see its card.
Full reading
च्वौ च
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
A long is substituted for the final vowel of the अङ्ग (stem) before the Adverbial affix च्वि -- अभूततद्भावे कृभ्वस्तियोगे सम्पद्यकर्तरि च्विः 5.4.50.
As शुची करोति, शुची स्यात्, शुची भवति, पटू करोति, पटू स्यात्, पटू भवति ॥ The च draws in the anuvritti of the phrase 'non-krit, and non-sarvadhatuka' from the last sutra, which though not of any direct use in this aphorism, is necessary for the sake of subsequent ones. See 7.4.32 for words ending in अ ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.