4.3.30
अमावास्याया वा
Operational rule vidhi
The affix वुञ् comes optionally after the word अमावास्या in the sense of 'born therein'.
Word by word (padaccheda)
Left context अमावास्यायाः pañcamī · ekavacanaIndeclinable वा avyaya
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
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Full reading
अमावास्यायाः वा
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix वुञ् comes optionally after the word अमावास्या in the sense of 'born therein'.
This debars अण् of 4.3.16. Thus अमावास्यकः or आमावास्यः ॥ This affix वुन् is applied to the word अमावस्य also, on the maxim एकदेशविकृतस्यानन्यत्वात् "That which has undergone a change in regard to one of its parts, is by no means in consequence of this change, something else than what it was before the change had taken place". Thus अमावस्यकः or आमावस्यः ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.