ज्ञाजनोर्जा

Operational rule vidhi

Before a शित् affix, जा is substituted for ज्ञा and जन्.

Word by word (padaccheda)

Target ज्ञाजनोः ṣaṣṭhī · dvivacanaWord जा

Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
Word Case not marked in the source data.

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Full reading

ज्ञाजनोः जा

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

Commentary

Before a शित् affix, जा is substituted for ज्ञा and जन्।
As जानाति and जायते ॥ The जन् here belongs to Divadi class, meaning 'to be produced', and not जन् of the Juhotyadi class. Why जा (long) and not ज, for this ज would assume the form जा by 7.3.101? This long आ of जा indicates the existence of the maxim given above in 7.3.78; and had ज been the substitute, 7.3.101, could not have lengthened it.

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