आढकाचितपात्रात् खोऽन्यतरस्याम्

Operational rule vidhi

The affix ख (ईन) may optionally be added in the above sense of 'being capable of holding etc.' after the words आढक, आचित and पात्र.

Word by word (padaccheda)

Left context आढक- आचित- पात्रात् pañcamī · ekavacanaSubstitute / term खः prathamā · ekavacanaRight context अन्यतरस्याम् saptamī · 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.
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").

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Full reading

आढक-आचित-पात्रात् खः अन्यतरस्याम्

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

Commentary

The affix ख (ईन) may optionally be added in the above sense of 'being capable of holding etc.' after the words आढक, आचित and पात्र।
This ख debars ठञ् which comes in the alternative. Thus आढकं संभवति, अवहरति, पचति वा = आढकीना or आढकिकी, आचितीना or आचितिकी, पात्रीणा or पात्रिकी ॥

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