5.3.49
प्रागेकादशभ्योऽच्छन्दसि
Operational rule vidhi
After an ordinal numeral up to 11 exclusive, comes the affix अन् , the word retaining its denotation when a 'part' is meant, but not so in the छन्दस् (Vedas).
Word by word (padaccheda)
Indeclinable प्राक् avyayaLeft context एकादशभ्यः pañcamī · bahuvacanaRight context अच्छन्दसि saptamī · ekavacana
- 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.
- 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").
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Full reading
प्राक् एकादशभ्यः अच्छन्दसि
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
After an ordinal numeral up to 11 exclusive, comes the affix अन् , the word retaining its denotation when a 'part' is meant, but not so in the छन्दस् (Vedas).
This is for accent also. Thus च꣡तुर्थः, प꣡ञ्चमः, स꣡प्तमः, न꣡वमः, द꣡शमः ॥ Why do we say प्रागेकादशः 'before eleven'? Observe एकादशः꣡, द्वादशः꣡ no change of accent 6.1.223. Why do we say 'not in the Chhandas'? Observe, पञ्चममिन्द्रियस्यापाक्रामत (पञ्चम꣡ has acute on the final being formed by डट् preceded by मट् 5.2.48, 5.2.49.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.