लुङ्लङ्लृङ्क्ष्वडुदात्तः

Operational rule vidhi

In case of the लुङ्लकार, लङ्लकार and लृङ्लकार, the अङ्ग gets an 'अट्' आगम, which is also उदात्त.

Word by word (padaccheda)

Right context लुङ्- लङ्- लृङ्क्षु saptamī · bahuvacanaSubstitute / term अ prathamā · ekavacanaSubstitute / term prathamā · ekavacana

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").
Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.

Dotted words are technical terms. Hover or tap one to see its card.

Pink letters are it-markers (anubandhas), tags dropped by 1.3.9. Hover or tap one for the rule that marks it, or try the it-letter finder.

Full reading

लुङ्-लङ्-लृङ्क्षु अट्

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

अट् acutely accented (उदात्त) is the augment of the verbal अङ्ग (stem) in the Aorist, Imperfect and the Conditional.
Thus अकार्षीत्, अहार्षीत्, अकरोत्, अहरत् and अकरष्यित्, अहिरिष्यत् ॥

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.