These prāgdiśīya affixes come after the word kim and after a stem called sarvanāma and after bahu but not after dvi etc.,
The words द्वि &c, though सर्वनाम are exempted. Thus कुत्र, कृतः, यतः, यत्र, बहुतः, बहुत्रः ॥
Why do we say अद्व्यादि 'not dvi &c'. Observe द्वाभ्याम्, द्वयोः ॥ Why do we say किम् &c ? Observe वृक्षात्, वृक्षं &c. The word किम् is a सर्वनाम, but it being included in the dyadi class, would have been exempted from the operation of this rule had it not been separately mentioned.
Vart:- The word बहु here is a Sankhya. Therefore, the affix does not apply here, बहोः सूपात्, बहौ सूपे ॥,