अभ्यमित्राच्छ च

Operational rule vidhi

The affixes छ (ईय), यत् (यं) and ख (ईन) come in the sense of 'who is able to go' after the word अभ्यमित्र.

Word by word (padaccheda)

Left context अभ्यमित्रात् pañcamī · ekavacanaWord छ Indeclinable 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.
Word Case not marked in the source data.
Indeclinable An avyaya such as च "and", वा "optionally", न "not".

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Full reading

अभ्यमित्रात् छ च

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

Commentary

The affixes छ (ईय), यत् (यं) and ख (ईन) come in the sense of 'who is able to go' after the word अभ्यमित्र।
The च् draws in यत् and ख. Thus अभ्यमित्रं अलंगामा = अभ्यमित्रीयः, अभ्यमित्र्यः, अभ्यमित्रीणः 'an warrior who valiantly encounters his enemy' = अमित्राभिमुखं सुष्ठु गच्छति ॥

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