हश्च व्रीहिकालयोः

Operational rule vidhi

After the verb हा , also the affix ण्युट् is used when the agent so expressed denotes 'rice' and 'time'.

Word by word (padaccheda)

Left context हः pañcamī · ekavacanaIndeclinable च avyayaRight context व्रीहि- कालयोः saptamī · dvivacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
Indeclinable An avyaya such as च "and", वा "optionally", न "not".
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

हः च व्रीहि-कालयोः

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

Commentary

After the verb हा , also the affix ण्युट् is used when the agent so expressed denotes 'rice' and 'time'.
The verb हा denotes two verbs हाक 'to abandon' and हाङ् 'to go' both belonging to the Third Conjugation, forming जहाति and जिहीते as 3rd per. sing. Thus हा + ण्युट् = हायनः 'a kind of rice' (that which jahati 'leaves off' all water) हायनः 'a year' (that which jihite 'goes through' all conditions.)

The accents are however different in the two. In one case the udatta is on the middle; in the other, on the last.

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