काम्यच्च

Operational rule vidhi

And the affix काम्यच् is also used in the sense of 'wishing' after a word ending in a case-affix, expressing the object wished as connected with the wisher's self.

Word by word (padaccheda)

Substitute / term काम्यच् prathamā · ekavacanaIndeclinable च avyaya

Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
Indeclinable An avyaya such as च "and", वा "optionally", न "not".

Dotted words are technical terms, dashed ones pratyāhāras (names for classes of sounds or affixes). Hover or tap one to see its card.

Full reading

काम्यच् च

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

And the affix काम्यच् is also used in the sense of 'wishing' after a word ending in a case-affix, expressing the object wished as connected with the wisher's self.
Thus, पुत्रकाम्यति 'he wishes for a son of his own'.

The making of this a separate sutra instead of adding it with the last aphorism and making one sutra of them both, is for the sake of the subsequent sutra, where the anuvritti of kyach only runs, and not that of kamyach. The क of kamyach is not indicatory, but is a part of the real affix. Here, therefore, rule 1.3.8 which would have made the letter क indicatory, does not apply; because no particular purpose would be served by making indicatory. Or the affix kamyach may be considered to have an indicatory च before it i.e. the affix being chakamya.

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.