ar -- uraṇ raparaḥ [[1.1.51]] is substituted for the ṛ or ṝ of the reduplicate.,
As ववृते, ववृधे, शशृधे, नर्नर्त्ति, नरिनर्त्ति, नरीनर्त्ति ॥ The र् is elided by 7.4.60. In the Intensives 7.4.90 &c, are applied, by which after the substitution of अर् by the present sutra, we apply those sutras and add रीक रुक् रिक् &c: for the maxim is अभ्यासविकारेषु अपवादो नोत्सर्गान् विधीन् बाधते \so far as the changes of a reduplicative syllable are concerned special (apavada) rules do not supersede the general (utsarga) rules\.,