8.4.54
अभ्यासे चर्च
Operational rule vidhi
A झल् letter present in an अभ्यास is converted either to a जश् letter or a चर् letter as appropriate.
Word by word (padaccheda)
Right context saptamī · ekavacanaSubstitute / term prathamā · ekavacanaIndeclinable च avyaya
- Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").
- 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
च
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The चर् is also substitute of झल् letters occurring in a reduplicate syllable, as well as जश्।
In a reduplicate syllable, a sonant non-aspirate (जश्) as well as a surd non aspirate (चर्) is the substitute of a Mute letter. By applying the rule of nearest in place 1.1.50, we find that sonant non-aspirate (जश्) is the substitute of all sonants; and is the substitute of all surds. In other words all aspirate letters become non-aspirate. The word जश् has been drawn into the sutra by the word च 'also'.
Thus चिखनिषति ॥ Here सन् (Desiderative), is added to the root खन्, the ख is changed to छ by 7.4.62, and this aspirate छ is now changed to non-aspirate by the present sutra. चिच्छिषति, टिठकारयिषति, तिष्ठासति, पिफकारयिषति, बुभूषति, जिघत्सति, डुढौकिषते ॥
If there is चर् (non-aspirate surd) in the original, it will remain of course unchanged. As, चिचीषति, टिटीकिषते, तितनिषति ॥
The original जश् also remains unchanged. Thus जिजनिषति, बुबुधे, ददौ, डिड्ये ॥ Or to be more accurate a चर् is replaced by a चर् and a जश् by a जश् letter.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.