6.4.84
वर्षाभ्वश्च
Operational rule vidhi
The word वर्षाभू gets a यणादेश when followed by an अजादि-सुप्-प्रत्यय.
Word by word (padaccheda)
Target वर्षाभ्वः ṣaṣṭhī · ekavacanaIndeclinable च avyaya
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
Dotted words are technical terms, dashed ones pratyāhāras (names for classes of sounds or affixes). Hover or tap one to see its card.
Full reading
वर्षाभ्वः च
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The semi-vowel व् is substituted for the ऊ of वर्षाभू also when a case-affix beginning with a vowel follows.
As वर्षाभ्वौ, वर्षाभ्वः ॥ वर्षाभू 'what is born in the rains, a kind of herb.' This is an exception to the subsequent rule.
Vart:- The semi-vowel substitution takes place when दृन्, कार and पुनर् precede भू; as दृन्भ्वौ, दृन्भवः, पुनर्भ्वौ, पुनर्भ्वः, कारभ्वौ (काराभ्वौ), कारभ्वः (काराभ्वः) ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.