वस्व् एकाज्-आद्-घसाम्

Thus आदिवान्, ओशिवान्, पेचिवान्, शेकिवान् ॥ In the first two of these, the reduplicate stems आद् and आश् become of one syllable by the coalescence of अ अद् and अअश् ॥ In पेच् and शेक् the reduplicate is elided and the vowel अ changed to ए, and thus the reduplicate has become of one syllable. Of roots ending in आ we have, ययिवान्, तस्थिवान्, of घस्-जक्षिवान् ॥ This वस् would have taken the augment by the general rule of इट् increment, the present sutra makes a niyama, so that the roots which are not monosyllabic in their reduplicate form are anit: as बिभिद्वान्, चिच्छिद्वान्, बभूवान्, शिश्रिवान् ॥ The niyama is made with regard to the roots which would have taken इट् generally, as not being governed by the prohibition in 7.2.13. The roots ending in long आ may consist of more than one syllable in their reduplicate form, as याया + वस्, hence their separate enumeration: as a matter of fact, however, these reduplicates also become monosyllabic ultimately by losing their आ ॥ The root दरिद्रा is not governed by this rule, for its Perfect will be formed periphrastically by 3.1.35 Vartika, because it consists of more than one syllable: as दरिद्रांचकार ॥ And when आम् is not added, there also दरिद्रा loses its final आ before ardhadhatuka affixes by the vartika under 6.4.114. So the आ being elided before the adding of any affix, this becomes a root which no longer ends in आ, and so the cause of adding इट् under this sutra no longer exists, and so no इट् is added. Thus we have ददरिद्वान्, for before ardhadhatuka affixes दरिद्रा loses its आ (6.4.114 Vartika), and this elision being considered as siddha, (6.4.114 Vartika), no occasion remains for the augment इट् ॥ The घस् becomes जक्ष् in its reduplicate form (a stem of one syllable), but had it not been separately mentioned, then by 6.4.100, the penultimate अ of घस् would have been elided first, before reduplication, because 6.4.100, is subsequent in order to the rule ordaining reduplication. (6.1.14 &c). The अ being elided, we should have घ्स् only, which not having any vowel, could not be reduplicated. By its separate enumeration here, the augment इट् being ordained by a subsequent rule 7.2.67, prevents even the rule of elision 6.4.100. Having, therefore, first added इट्, we then elide the penultimate अ by 6.4.98, this elided अ, however, becomes sthanivat for the purposes of reduplication only by 1.1.52. Thus घस् + इवस् = घ्स् + इवस् 6.4.98 = जक्ष् + इवस् = जक्षिवान् ॥,