vṛddhi is substituted for the short a when it is immediately followed by the final r or l of a root, before the parasmaipada 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 ॥,