For the subsequent a (i.e. for the a of the root and not of the reduplicate), there is substituted u in the Intensive (with expressed or elided yaṅ).,
The examples have been given above, as चंचूर्यते, चंचूरीते and पंफुल्यते पंफुलीते ॥ Why do we say 'the अ which stands subsequent to the reduplicate'? The substitute does not replace the अ of the reduplicate. Why do we say 'of अ'? The substitute should not replace the final letter, which it otherwise would have done by (I. I. 52). The त् in उत् debars guna 7.3.86 in चंचूर्ति and पंफुलीति, for though उ is lengthened by 8.2.77, in चंचूर्ति, yet that lengthening is considered as non-existent or asiddha 8.2.1 for the purposes of Guna 7.3.86. Quere. If the त् in उत् debars guna, why should it not debar lengthening also of 8.2.7?,