6.4.55
अयामन्ताल्वाय्येत्न्विष्णुषु
Operational rule vidhi
अय् is substituted for the इ of णि before the affixes 1. आम् 2. अन्त 3. आलु 4. आय्य 5. इत्नु and 6. इष्णु.
Word by word (padaccheda)
Substitute / term अय् prathamā · ekavacanaRight context आम्- अन्त- आलु- आय्य- इत्नु- इष्णुषु saptamī · bahuvacana
- 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
अय् आम्-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
अय् is substituted for the इ of णि before the affixes 1. आम् 2. अन्त 3. आलु 4. आय्य 5. इत्नु and 6. इष्णु।
Thus कारयां चकार, हारयां चकार, गण्डयन्तः, मण्डयन्तः ( formed by the Unadi affix झच्, झ = अन्त, added to the roots गंड and मंड) आलु । स्पृहयालुः । आय्य, स्पृहयाय्यः, गृहयाय्यः ॥ इत्नुः - स्तनायत्नुः ॥ इष्णुः - पोषयिष्णुः ॥ Thus sutra could have been well dispensed with; for the इ of णि would take guna ए which will be changed to अय् by the rules of Sandhi, before these affixes. This substitution of अय् for इ is for the sake of the subsequent sutra however, because there इ could not be changed to अय by any sandhi-rules.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.