3.4.109
सिजभ्यस्तविदिभ्यश्च
Operational rule vidhi
The झि-प्रत्यय of a ङित्-लकार that follows सिच्, अभ्यस्त or the verb root विद् is converted to जुस्.
Word by word (padaccheda)
Left context सिच्- - विदिभ्यः pañcamī · bahuvacanaIndeclinable च avyaya
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
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Full reading
सिच्-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
(In those tenses which are marked with an indicatory ङ् ) जुस् is the substitute of झि when it comes after an लुङ् (Aorist) in सिच् or the लङ् (Imperfect Tense) of a reduplicated verb or the root विद् 'to know'.
This applies to tenses having ङ् other than that of लिङ्, namely, the लङ् and लुङ् ।
सिच् is employed in forming the first Aorist. The reduplicated verbs, as well as the verb विद्, form their third person plural in जुस्, in the tenses other than लिङ्, and those that take सिच् । The word ङितः of sutra 3.4.99, is understood here also; and therefore this rule is restricted to the Imperfect (लङ्) of the reduplicated verb. Thus of सिच्, we have अकार्षुः, अहार्षः । Similarly, after the Imperfect of the reduplicated verbs, we have अविभयुः, अजिहयुः, अजागरुः । In the case of विद्, we have अविदुः ।
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.