5.2.18
गोष्ठात् खञ् भूतपूर्वे
Operational rule vidhi
The affix खञ् comes in the sense of 'it formerly had been' after the word गोष्ठ.
Word by word (padaccheda)
Left context गोष्ठात् pañcamī · ekavacanaSubstitute / term prathamā · ekavacanaRight context भूतपूर्वे 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.
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
- 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
गोष्ठात् खञ् भूतपूर्वे
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix खञ् comes in the sense of 'it formerly had been' after the word गोष्ठ।
The word गोष्ठ is a compound of गो + स्था i.e. a cow-pen, it means the place all around a cow-pen. The word भूतपूर्व qualifies it. Thus गोष्ठो भूतपूर्वः = गौष्ठीनो देशः 'a place which was formerly a Goshtha'. Otherwise when not meaning formerly, we have गोष्ठो वर्तते ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.