6.2.133
नाचार्यराजर्त्विक्संयुक्तज्ञात्याख्येभ्यः
Operational rule vidhi
The word पुत्र does not have an acute accent (उदात्त) on the first syllable when preceded by a word which falls under the category of teachers, kings, priests, wife's relations and agnates and cognates.
Word by word (padaccheda)
Indeclinable न avyayaLeft context आचार्य- राज- ऋत्विक्- संयुक्त- ज्ञाति- आख्येभ्यः pañcamī · bahuvacana
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
- 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
न आचार्य-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The word पुत्र does not have an acute accent (उदात्त) on the first syllable when preceded by a word which falls under the category of teachers, kings, priests, wife's relations and agnates and cognates.
The word आचार्य means 'teacher', राजा 'prince, king', ऋत्विज् 'a sacrificing priest', संयुक्ताः 'relations through the wife's side' as श्याला 'brother-in-law' &c: ज्ञाति means 'all kinsmen related through father and mother or blood-relations'. The word आख्या shows that the rule applies to the synonyms of 'teacher' &c, as well as to particular 'teacher' &c. Thus आचार्यपुत्रः꣡, उपाध्यायपुत्रः꣡, शाकटायनकपुत्रः꣡, राजपुत्रः꣡, ईश्वरपुत्रः꣡, नन्दपुत्रः꣡, ऋत्विकपुत्रः꣡, याजकपुत्रः꣡, होतुःपुत्रः꣡, 6.3.23 संयुक्तपुत्रः꣡, संबन्धिपुत्रः꣡, श्यालकपुत्रः꣡, ज्ञातिपुत्रः꣡, भ्रातुप्पुत्रः꣡ 6.3.23. Here the special accent of पुत्र taught in the last sutra being prohibited, the accent falls on the last syllable by the general rule 6.1.223.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.