7.3.64
ओक उचः के
Operational rule vidhi
ओक is irregularly formed from the root उच् with the affix क (अ).
Word by word (padaccheda)
Substitute / term ओकः prathamā · ekavacanaTarget उचः ṣaṣṭhī · ekavacanaRight context के saptamī · ekavacana
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- 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
ओकः उचः के
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
उचः → ओकः / के
Replace ucaḥ with okaḥ when ke follows. Inherited words (anuvṛtti) may add further conditions.
Commentary
ओक is irregularly formed from the root उच् with the affix क (अ).
The change of च् into क्, and the Guna are the irregularities. As न्योकः 'a bird, a tree'. The affix क is added under 3.1.135. The क is added with the force of घञ् the Karaka relation being that of Location &c. The घञ् affix would have given the form regularly, but then the word would have been acutely accented on the first syllable, but it is desired that the acute should be on the last. The words दिवौकसः, जलौकसः &c are also irregular, formed with the Unadi affix असुन् the क् being substituted for च् as an Unadi diversity (bahulam).
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.