कारस्करो वृक्षः

Operational rule vidhi

The word कारस्कर means 'a tree'.

Word by word (padaccheda)

Substitute / term कारस्करः prathamā · ekavacanaSubstitute / term वृक्षः prathamā · ekavacana

Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.

Full reading

कारस्करः वृक्षः

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

The word कारस्कर means 'a tree'.
This word is formed from कार + कृ + ट 3.2.21 = कारस्करः ॥ When not meaning a tree, the form is कारकरः ॥ Some do not make this a separate sutra, but include it in the next aphorism.

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.