6.4.27
घञि च भावकरणयोः
Operational rule vidhi
When followed by the घञ्-प्रत्यय in the meaning of भाव or करण the उपधा-नकार of the verb root रञ्ज् is removed.
Word by word (padaccheda)
Right context घञि saptamī · ekavacanaIndeclinable च avyayaRight context भावकरणयोः saptamī · dvivacana
- 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
घञि च भावकरणयोः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The penultimate nasal of रञ्ज् is elided before घञ् when the word formed with it expresses a state or an instrument.
Thus रागः 'passion, color, or the coloring stuff'. Thus आश्चर्यो रागः, विचित्र रागः denote भाव, while रज्यतेऽनेनिति रागः denotes instrument. The घञ् is added by 3.3.121; and च् changed to क् by 7.3.52. But रङ्गः = रजन्ति तस्मिन् 'a theatre'.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.