4.1.28
अन उपधालोपिनोन्यतरस्याम्
Operational rule vidhi
The affix ङीप् comes after that बहुव्रीहि समास which ending in the syllable अन् loses its penultimate अ.
Word by word (padaccheda)
Left context अनः pañcamī · ekavacanaLeft context - लोपिनः pañcamī · ekavacanaRight context अन्यतरस्याम् saptamī · ekavacana
- 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
अनः -
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix ङीप् comes after that बहुव्रीहि समास which ending in the syllable अन् loses its penultimate अ।
Thus बहुराजन् is a Bahuvrihi compound ending in अन्; in applying nip, it loses is penultimate by 6.4.134 (अल्लोपोऽनः there is elision of अ of अन् when a bha affix follows). Thus बहुराज्ञी 'having many kings'. In the alternative, when nip is not added, we may add the affix डाप् by 4.1.13. Thus बहुराजा, बहुराजे, बहुराजाः ॥ Or we may apply the prohibition contained in 4.1.12 and have बहुराजा, बहुराजानौ, बहुराजानः ॥ when the penultimate is not elided we cannot apply the affix ङीप् at all : in cases of such compounds there are only two forms of the feminine noun as सुपर्वा, सुपर्वे, सुपर्वाः or सुपर्वा सुपर्वाणौ, सुपर्वाणः ॥ That is to say we apply 4.1.13 and 4.1.12 only; for in the case of सुपर्वन् &c. rule 6.4.137 prevents the elision of the penultimate न्; (न संयोगाद्वमनन्तात्, there is not elision of the अ of अन् when it comes after a conjunct consonant ending in व or म)॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.