There is however no homogeneity between vowels and consonants, though their place and effort be equal.,
This sutra lays down an exception to the former sutra. There can be no homogeneity or savarna relationship between vowels and consonants, though their आस्य and प्रयत्न may be the same. Thus इ and श have the same आस्य namely तालु 'palate,' and the same प्रयत्नः namely vivrita, but still they are not to be called savarna. Thus in दण्डहस्त, दधिशीतलं &c., the letters अ and ह in the first example, and इ and श in the second not being homogeneous letters; there is no combination or sandhi, which would otherwise have taken place.
Similarly if श and इ be held homogeneous, then विपाश+अण् 4.3.53 = विपाश्+अण् 6.4.148; here श would be elided by 6.4.148, but it is not so and we have वैपाशः \belonging to vipåså or born therein.\ So also in आनडुहं \ox-skin,\ the ह would have been omitted, if held homogeneous with अ.,