6.1.100
नित्यमाम्रेडिते डाचि
Operational rule vidhi
When a word which is used to imitate some abstract sound and which ends is the phrase 'त्' is followed by an आम्रेडितसंज्ञक which is further followed by the pratyay डाच्, then the 'त्' of the first word and the first letter of the आम्रेडितसंज्ञक are combined to form a पररूप-एकादेश.
Word by word (padaccheda)
Indeclinable नित्यम् avyayaRight context saptamī · ekavacanaTarget डाचि ṣaṣṭhī · ekavacana
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
- Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").
- 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
नित्यम् डाचि
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
Of such a doubled sound-imitation word, to which the affix आ is added which causes elision of the final अत् , for the final त् of the first member and the initial consonant of the second member, such subsequent consonant is always the single substitute.
Thus पटपटा करोति 5.4.57, दमदमा करोति ॥ पटत्पटत् + डाच् 5.4.57 = पटत्पटा = पटपटा (त् + प् = प्) ॥ This sutra is really a Vartika. When the affix डाच् 5.4.57 is added to पटत्, there is doubling of the word by the Vartika under 8.1.12: this doubling takes place before the final अत् is elided.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.