1.4.68
अस्तं च
Definition saṃjñā निपातसंज्ञाDefinition saṃjñā गतिसंज्ञा
And the indeclinable word अस्तम् 'at home' is called गति , when in composition with a verb.
Word by word (padaccheda)
Indeclinable अस्तम् avyayaIndeclinable च avyaya
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
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Full reading
अस्तम् च
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
And the indeclinable word अस्तम् 'at home' is called गति , when in composition with a verb.
The word अस्तम् is an indeclinable as it ends in म् (1.1. 39); and means 'not visible.' As अस्तंगत्य सविता पुनरुदेति the sun having set, rises again अस्तंगतानि धनानि riches that have vanished. यदस्तं गच्छति, when not an indeclinable it is not gati as अस्तं काण्डम् the arrow has been thrown.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.