लोकसर्वलोकाट्ठञ्

Operational rule vidhi

The affix ठञ् (+/- इक) comes in the sense of 'known therein' after the words लोक and सर्वलोक , in the 7th case in construction.

Word by word (padaccheda)

Left context लोक- सर्वलोकात् pañcamī · ekavacanaSubstitute / term 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.

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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

लोक-सर्वलोकात् ठञ्

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

Commentary

The affix ठञ् (+/- इक) comes in the sense of 'known therein' after the words लोक and सर्वलोक , in the 7th case in construction.
Thus लोके विदितः = लौकिकः, सार्वलौकिकः ॥ The irregular Vriddhi of both members takes place by 7.3.20.

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