चजोः कु घिण्ण्यतोः

Operational rule vidhi

For the final च् or ज् of a root, there is substituted a corresponding guttural, before an affix having an indicatory ध् and before ण्यत्.

Word by word (padaccheda)

Target चजोः ṣaṣṭhī · dvivacanaSubstitute / term कु prathamā · ekavacanaRight context - ण्यतोः saptamī · dvivacana

Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
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").

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

चजोः कु -ण्यतोः

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

As a rewrite rule (sketch from case endings)

चजोः → कु / - ण्यतोः

Replace cajoḥ with ku when ghit-ṇyatoḥ follows. Inherited words (anuvṛtti) may add further conditions.

For the final च् or ज् of a root, there is substituted a corresponding guttural, before an affix having an indicatory ध् and before ण्यत्।

As पाक, त्यागः, रागः with घञ्, and चाक्यम्, वाक्यम् and रेक्यम् with ण्यत् ॥ Compare 7.3.59.

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