The vṛddhi (ār) is substituted for the root vowel (ṛ) of the aṅga (stem) mṛj before an affix.,
As मार्ष्टा, मार्ष्टुम्, मार्ष्टव्यम् ॥ The मृज् here is a root, and the affixes before which this Vriddhi takes place are those which come after roots, and not which come after Pratipadikas. Therefore, not before the affixes भ्यां &c, as कंसपरिमृड्भ्याम्, मृड्भिः ॥ The anuvritti of the word vibhakti has ceased. This sutra debars guna of 7.3.84.,