4.2.65
सूत्राच्च कोपधात्
Operational rule vidhi
The affix denoting denoting 'who studies or who knows that' is elided by लुक् after the title of a sūtra work having क् as penultimate.
Word by word (padaccheda)
Left context सूत्रात् pañcamī · ekavacanaIndeclinable च avyayaLeft context कोपधात् pañcamī · ekavacana
- 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".
Dotted words are technical terms. Hover or tap one to see its card.
Full reading
सूत्रात् च कोपधात्
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix denoting denoting 'who studies or who knows that' is elided by लुक् after the title of a sūtra work having क् as penultimate.
Thus अष्टकं is the title of Panini sutra. Those who study अष्टकं and will be called also अष्टकः, as अष्टकाः पाणिनीयाः 'those who study, the Ashtaka'. So also दशका वैयाघ्रपदीयाः, त्रिकाः काशकृत्स्नाः ॥
Vart:- The elision takes place only where the title is formed by a numeral: as in the examples above given. Thus महावार्तिकं सूत्रमधीते = महावार्तिकः, so also कालापकः ॥
Why do we say "having क् for its penultimate"? Observe चतुष्टयमधीते = चातुष्टयः ॥ This sutra applies, of course, to those words which are not formed by affixes denoting प्रोक्त or the Announcer.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.