5.1.24
विंशतित्रिंशद्भ्यां ड्वुन्नसंज्ञायाम्
Operational rule vidhi
The affix डुवन् (-/- -अक) comes in the senses taught up to (5.1.63) after the words विंशति and त्रिंशत् , when it does not denote a Name: the ति and अत् of the base being dropped before this affix.
Word by word (padaccheda)
Left context विंशति- त्रिंशद्भ्याम् pañcamī · dvivacanaSubstitute / term ड्वुन् prathamā · ekavacanaRight context असंज्ञायाम् 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
विंशति-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix डुवन् (-/- -अक) comes in the senses taught up to 5.1.63 after the words विंशति and त्रिंशत् , when it does not denote a Name: the ति and अत् of the base being dropped before this affix.
Thus विंशति + ड्वुन् = विंश + अक 6.4.142 = विंशक; त्रिंशत् + ड्वुन् = त्रिंश् + अक 6.4.143 = त्रिंशकः ॥
Why do we say असंज्ञायाम् 'when not denoting a Name'? Observe, विंशतिकः, त्रिंशत्कः formed by affix कन् 5.1.22. Q. Why do you affix कन्, when it is prohibited by the phrase अतिशदन्तायाः; for विंशति ends in ति and त्रीशत् ends in शत् ? The affix कन् will be added by dividing the sutra into two: viz: (1) विंशतित्रिंशद्भ्यां (2) ड्वुनसंज्ञायाम्; the meanings being (1) The affix 'Kan' is added to vinsati and trinsat; (2) The affix dvun is added to the same words, when not denoting a name.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.