7.1.45
तप्तनप्तनथनाश्च
Operational rule vidhi
Also त and तन (before both, on account of the indicatory प् the preceding vowel of the verbal अङ्ग (stem) is strengthened or if weak not shortened) तन and थन are substituted for the त of the 2nd person plural Imperative in the छन्दस् (Vedas).
Word by word (padaccheda)
Substitute / term तप्- तनप्- तन- थनाः prathamā · bahuvacanaIndeclinable 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.
Full reading
तप्-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
Also त and तन (before both, on account of the indicatory प् the preceding vowel of the verbal अङ्ग (stem) is strengthened or if weak not shortened) तन and थन are substituted for the त of the 2nd person plural Imperative in the छन्दस् (Vedas).
This शृणोत ग्रावाणः (for शृणुत), सुनोत (= सुनुत), संवरत्रा दधातन (for धत्त), जुजुष्टन (for जुषत) the slu vikarana being added as a Vedic irregularity; यदिष्ठन for यदिच्छत ॥ The indicatory प् makes तप् and तनप् non-ङित् affixes 1.2.4.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.