7.2.66
इडत्त्यर्तिव्ययतीनाम्
Operational rule vidhi
थल् the personal-ending of the लिट् (Perfect Tense) gets the augment इट् after 1. अद् 2. ॠ and 3. व्यय्.
Word by word (padaccheda)
Substitute / term इट् prathamā · ekavacanaTarget अत्त्यर्तिव्ययतीनाम् ṣaṣṭhī · bahuvacana
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
Dotted words are technical terms. Hover or tap one to see its card.
Full reading
इट् अत्त्यर्तिव्ययतीनाम्
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
अत्त्यर्तिव्ययतीनाम् → इट्
Replace attyartivyayatīnām with iṭ. Inherited words (anuvṛtti) may add further conditions.
Commentary
थल् the personal-ending of the लिट् (Perfect Tense) gets the augment इट् after 1. अद् 2. ॠ and 3. व्यय्।
As आदिथ, आरिथ and संविव्ययिथ ॥ The root व्येञ् is not changed to व्या 6.1.46 in the Perfect. By 7.2.63, the roots अद् and व्य would have optionally been सेट्, and ऋ never, therefore, the present sutra makes the इट् augment compulsory. The इट् is repeated in the aphorism for the sake of clearness, the rule could have stood without it, for the anuvritti of 'optionally' could not have run into it from the last sutra: for if it was an optional sutra, the enumeration of अद् and व्य was useless, as they were already provided for by 7.2.63. Therefore, this sutra makes an invariable rule.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.