5.2.44
उभादुदात्तो नित्यम्
Operational rule vidhi
After the word उभ , अयच् is always the substitute for तयप् , having the उदात्त (acute accent) on its first syllable.
Word by word (padaccheda)
Left context उभात् pañcamī · ekavacanaSubstitute / term prathamā · ekavacanaSubstitute / term नित्यम् 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.
- 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.
Full reading
उभात् नित्यम्
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
After the word उभ , अयच् is always the substitute for तयप् , having the उदात्त (acute accent) on its first syllable.
The affix अय꣡च् having indicatory च् takes the acute accent on the final syllable 6.1.163, i. e. on य, the special mention of the udatta in the sutra shows that the accent should be on a syllable which would otherwise not have taken it i. e. the first syllable i. e. अ; for had this not been the meaning, there was no necessity of using the word udatta in the sutra.
If उभ is a Sankhya word (1.1. 23) in the secular sense, it would have taken तयप्, the present sutra ordains अय꣡ instead as a substitute always. If it is not a Sankhya, then we should first ordain तयप् after it, by the process of splitting the sutra 5.2.42 ante into two, thus संख्यायाः तयप्, अवयवे तयप् and then replace तयप् by अय꣡ ॥
Thus उभौ पीतलोहितौ अवयवौ यस्य = उभयः ॥ उभ꣡ये देवमनुष्याः; उभ꣡योः मणिः ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.