5.2.55
त्रेः सम्प्रसारणं च
Operational rule vidhi
The affix तीय comes in the sense of 'completer thereof' after the word त्रि and there is सम्प्रसारण (Vocalisation) of the stem.
Word by word (padaccheda)
Left context त्रेः pañcamī · ekavacanaSubstitute / term prathamā · ekavacanaIndeclinable च avyaya
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
- 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
त्रेः 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 तीय comes in the sense of 'completer thereof' after the word त्रि and there is सम्प्रसारण (Vocalisation) of the stem.
The substitution of a vowel for a semi-vowel is samprasarana 1.1.45. Thus त्रि + तीय = तृ + इ + तीय = तृतीयः (6.1.108, the इ of त्रि assumes the form of the prior letter ऋ which is substituted for र्). In तृतीयः the ऋ is not lengthened by 6.4.2, because that rule applies to the lengthening of the अण् letters only, this word being read into 6.4.2, by anuvritti from (VI.3. III). The pratyahara अण् is formed by the first ण्, and means the letters अ, इ and उ ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.