7.1.77
ई च द्विवचने
Operational rule vidhi
The acutely accented (उदात्त) ई is substituted for the final of 1. अस्थि 2. दधि 3. सक्थि and 4. अक्षि in the छन्दस् (Vedas) when the case-affixes of the dual follow.
Word by word (padaccheda)
Word ई Indeclinable च avyayaRight context saptamī · ekavacana
- Word Case not marked in the source data.
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
- 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
ई च
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The acutely accented (उदात्त) ई is substituted for the final of 1. अस्थि 2. दधि 3. सक्थि and 4. अक्षि in the छन्दस् (Vedas) when the case-affixes of the dual follow.
As अक्षी꣡ ते इन्द्रपिङ्गले कपेरिव ॥ अक्षी꣡भ्यान् ते नासिकाभ्याम् ॥ In अक्षी the augment नुम् is not added to the stem before the vowel-beginning ending, because 7.1.73, which ordained नुम्, is superseded by the present sutra, and being once superseded, it is superseded for good. (सकृद् गतौ विप्रतिषेधे यद्बाधितं तद्बाधितमेव) ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.