6.1.196
थलि च सेटीडन्तो वा
Operational rule vidhi
Before the ending थ of the Perfect, Second Person Singular, when this ending takes the augment इ ; the acute accent falls either on the first syllable, or on this इ , or on the personal ending.
Word by word (padaccheda)
Right context थलि saptamī · ekavacanaIndeclinable च avyayaRight context सेटि saptamī · ekavacanaSubstitute / term इट् prathamā · ekavacanaSubstitute / term अन्तः prathamā · ekavacanaIndeclinable वा avyaya
- 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").
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
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Full reading
थलि च सेटि इट् अन्तः वा
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
Before the ending थ of the Perfect, Second Person Singular, when this ending takes the augment इ ; the acute accent falls either on the first syllable, or on this इ , or on the personal ending.
Thus लु꣡लविथ, लुल꣡विथ, लुलविथ꣡, and लुलविथ꣡. As थल् has an indicatory ल्, the syllable preceding the affix may have also the accent 6.1.193. Thus we get the four forms given above. In short, with इथ termination, the accent may fall on any syllable. When the थ is not सेट्, the accent falls on the root and we have one form only by लिट् accent 6.1.193 :- ययाथ ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.