तसिश्च

Operational rule vidhi

The affix तसि comes in the sense of 'in the same direction with that'.

Word by word (padaccheda)

Substitute / term त ः prathamā · ekavacanaIndeclinable च avyaya

Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
Indeclinable An avyaya such as च "and", वा "optionally", न "not".

Dotted words are technical terms. Hover or tap one to see its card.

Pink letters are it-markers (anubandhas), tags dropped by 1.3.9. Hover or tap one for the rule that marks it, or try the it-letter finder.

Full reading

तसिः च

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

Commentary

The affix तसि comes in the sense of 'in the same direction with that'.
This ordains another affix in addition to the previously taught अण् &c ञ &c. The words formed by this affix are Indeclinables 1.1.37. Thus हिमवतः 'in the same direction as Himavat.' पीलुमूलतः, सुदामतः ॥

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