4.2.103
वर्णौ वुक्
Operational rule vidhi
To the same stem is added the affix वुक् when it treats about something which is to be found in the land of वर्णु (name of a river and also the country near it).
Word by word (padaccheda)
Right context वर्णौ saptamī · ekavacanaSubstitute / term prathamā · ekavacana
- 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").
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
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Full reading
वर्णौ वुक्
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
To the same stem is added the affix वुक् when it treats about something which is to be found in the land of वर्णु (name of a river and also the country near it).
The Varnu is the name of a river, and the country near it is also called Varnu, the affix denoting country being elided by 4.2.81. Thus कान्थकम् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.