6.1.99
नाम्रेडितस्यान्त्यस्य तु वा
Operational rule vidhi
When a word which is used to imitate some abstract sound and which ends is the phrase 'अत्' and which is also an आम्रेडितसंज्ञक is followed by the word 'इति', then the 'अत्' of the previous word and the इ of इति are not combined as mentioned in the previous rule 'अव्यक्तानुकरणस्यात इतौ'. Instead, the त् and इ optionally combine to form a पररूप-एकादेश.
Word by word (padaccheda)
Indeclinable न avyayaTarget ṣaṣṭhī · ekavacanaTarget अन्त्यस्य ṣaṣṭhī · ekavacanaIndeclinable तु avyayaIndeclinable वा avyaya
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
Dotted words are technical terms, dashed ones pratyāhāras (names for classes of sounds or affixes). Hover or tap one to see its card.
Full reading
न अन्त्यस्य तु वा
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
This substitution does not take place when a sound-imitation word is doubled, here, however, for the final त् + इ , the single substitute is optionally इ (the second vowel).
Thus पटत्पटदिति or पटत्पटेति करोति (पटत्पटत् + इति = पटत्पट + इ + ति = पटत्पटेति) ॥ The word is doubled by 8.1.4. The para-rupa substitution will take place when the whole word so reduplicated denotes a sound imitation, thus पटत्पटिति करोति ॥ Here we apply the preceding sutra. The amredita is the name of the second member of the doubled word 8.1.2.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.