> *kr.'pam- + *-c^a 'and the form' --> *kr.pám-c^a >
> Av. k&r&p&m-c^a
>
But as^a- has as^a:-c^a (instr.) with no "r@...".
Analogy is still possible in your interpretation but I
think it's less likely in a fixed form like this.
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