5.3.92
किंयत्तदो निर्द्धारणे द्वयोरेकस्य डतरच्
Operational rule vidhi
After the words किम् , यद् and तद् in determining of the one out of two, comes the affix डतरच् (अतर with the elision of the final इम् and अद्).
Word by word (padaccheda)
Left context किम्- यत्- तदः pañcamī · ekavacanaRight context निर्द्धारणे saptamī · ekavacanaRight context द्वयोः saptamī · dvivacanaTarget एकस्य ṣaṣṭhī · ekavacanaSubstitute / term तर prathamā · 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").
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
Dotted words are technical terms. Hover or tap one to see its card.
Pink letters are it-markers (anubandhas), tags dropped by 1.3.9. Hover or tap one for the rule that marks it, or try the it-letter finder.
Full reading
किम्-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
एकस्य → डतरच् / किम्-
Replace ekasya with ḍatarac when it comes after kim-yat-tadaḥ when nirddhāraṇe dvayoḥ follows. Inherited words (anuvṛtti) may add further conditions.
Commentary
After the words किम् , यद् and तद् in determining of the one out of two, comes the affix डतरच् (अतर with the elision of the final इम् and अद्).
This affix comes in the svartha sense. The differentiation of a portion from the whole by means of its peculiar caste, action, attribute or name is called निर्द्धारण or specification. Thus कतरो भवतोः कठः 'amongst you two, who is Katha'. कतरो भवतोः कारकः 'amongst you two, who is the agent'. कतरो भवतोः पटुः 'amongst you two, who is clever'. कतरो भवतोः देवदत्तः 'which of the two amongst you is Devadatta'. Similarly यतरः 'of the two the one who', ततरः 'of the two--that one'. as यतरो भवतो देवदत्तः, ततर आगच्छतु 'of the two, let that one who is Devadatta, come'. The taddhita affixes being optional 4.1.82, this idea may be expressed by a sentence also. As, को भवतो देवदत्तः, स आगच्छतु 'who amongst you two is Devadatta, let him come'.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.