7.2.2
अतो ल्रान्तस्य
Operational rule vidhi
वृद्धि is substituted for the short अ when it is immediately followed by the final र् or ल् of a root, before the परस्मैपद s-Aorist.
Word by word (padaccheda)
Target अतः ṣaṣṭhī · ekavacanaWord ल्र Target अन्तस्य ṣaṣṭhī · ekavacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Word Case not marked in the source data.
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Full reading
अतः ल्र अन्तस्य
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
वृद्धि is substituted for the short अ when it is immediately followed by the final र् or ल् of a root, before the परस्मैपद s-Aorist.
As क्षर्-अक्षारीत्, त्सर्-अत्सारीत्, ज्वल्-अज्यालीत्, ह्मल्-अह्मालीत् ॥ This debars the option of 7.2.7. Why 'short अ'? Observe न्यखारीत् न्यमीलीत् ॥ Why do we say "ending in र or ल"? Observe मा भवानशीत्, मा भवानटीत् ॥ The word अन्त means here 'proximity', as in the sentence उदकान्तं गतः = उदकसमीपं गतः ॥ The अ must be in the proximity of the र and ल ॥ Therefore the rule does not apply to अवभ्रीत्, अश्वल्लीत्, for though र and ल are here final of the stem, yet are not in the proximity of अ ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.