Whatever will be taught in the following up to the end of this adhyāya should be understood to apply to the nominal stems called bha -- yaci bham [[1.4.18]], tasau matvarthe [[1.4.19]].,
Thus sutra 6.4.130 says 'पद् is the substitute of पाद्' ॥ It means पद् is substituted for पाद् when the latter gets the designation of भ ॥ Thus द्विपदः पश्य, द्विपदा कृतम् but द्विपादौ, दिपादः where the affixes are those of Sarvanamasthana.,