चूर्णादिनिः

Operational rule vidhi

The affix इनि comes after the word चूर्ण when the sense is 'mixed therewith'.

Word by word (padaccheda)

Left context चूर्णात् pañcamī · ekavacanaSubstitute / term इ ः prathamā · ekavacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.

Dotted words are technical terms. Hover or tap one to see its card.

Pink letters are it-markers (anubandhas), tags dropped by 1.3.9. Hover or tap one for the rule that marks it, or try the it-letter finder.

Full reading

चूर्णात् इनिः

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

Commentary

The affix इनि comes after the word चूर्ण when the sense is 'mixed therewith'.
This debars ठक् ॥ Thus चूर्णैः संसृष्टा = चूणिनो ऽपूपाः 'cakes sprinkled with powder.' चूर्णिनि धानाः ॥

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