3.1.76
तनूकरणे तक्षः
Operational rule vidhi
In presence of a सार्वधातुक प्रत्यय in the कर्तरि प्रयोग, the verb तक्ष् with the meaning 'to peel off / to scrape off' gets the श्नु विकरण optionally.
Word by word (padaccheda)
Right context तनूकरणे saptamī · ekavacanaLeft context तक्षः pañcamī · 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").
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
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Full reading
तनूकरणे तक्षः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix श्यन् is optionally used after the root अक्ष् 'to bore or hew' when it is preceded by the preposition सम् and when a सार्वधातुक affix denoting an agent, follows.
Thus तक्षति or तक्ष्णोति काष्टं 'he hews the wood'. But सन्तक्षति वाग्भिः 'he cuts with speech'.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.