Praudhamanorama 60_312

60_312

[On the derivation of] “śaka…”: the affix ac by the rule pacādi. The mention of “stha” is for clarity, because being situated in an affix is already obtained simply from the non-existence of an affix consisting solely of the letter k.
Why [is it said] “pūrvasya” (of that which precedes)? In sarvikā, etc., so that [the substitution of i] does not apply to that which follows the letter k, superseding the single substitute [resulting from] ṭāp, according to the metarule “tasmādityuttarasya”.
As for what some say—that the single substitute would be superseded by the metarule “an operation concerning a stem is stronger than an operation concerning a phoneme” (vārṇādāṅgam)—that is incorrect; because, just like subsequentness in the case of an exception, that stated metarule also is ineffective [here].
In truth, however, the locative mention “pratyayasthe ki” is alone proper, and the mention of “pūrvasya” could easily be abandoned.