चलनशब्दार्थादकर्मकाद्युच्

Operational rule vidhi

The affix युच् comes, in the sense of 'the agent having such a habit etc.' after intransitive verbs denoting 'motion' or 'sound'.

Word by word (padaccheda)

Left context चलनशब्दार्थात् pañcamī · ekavacanaLeft context अकर्मकात् pañcamī · ekavacanaSubstitute / term यु 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

चलनशब्दार्थात् अकर्मकात् युच्

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

Commentary

The affix युच् comes, in the sense of 'the agent having such a habit etc.' after intransitive verbs denoting 'motion' or 'sound'.
As, चल् + युच् = चलनः 'moving' 7.1.1; चोपनः 'creeping'; शब्दनः 'sounding'; रवणः 'roaring'.

Why do we say 'intransitive'? Observe पठिता विद्याम्.

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