3.2.52 लक्षणे जायापत्योष्टक्

Word by word (padaccheda)

Right context लक्षणे saptamī · ekavacanaRight context जाया- पत्योः saptamī · dvivacanaSubstitute / term टक् 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, dashed ones pratyāhāras (names for classes of sounds or affixes). Hover or tap one to see its card.

Full reading

लक्षणे जाया-पत्योः टक्

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

Commentary

The affix टक् comes after the verb हन् 'to kill' when it is in composition with the word जाया 'wife' or पति 'husband' as object and when the word so formed denotes the agent possessed of that attribute (or when the word so formed denotes a mark).
The word लक्षणा of this sutra gives rise to the doubt whether it means लक्षणे कर्तरि or लक्षणवति कर्तरि. In the former case the meaning will be 'when the agent is itself the mark'; as जायाघ्नः 'a mole' (a mark on the body indicative of the death of one's wife). In the latter case the meaning will be 'when the agent is possessed of the attribute denoted by the word'; as जायाघ्नः 'the murderer of his wife'; पतिघ्नी 'the murderer of her husband'.

Of the affix टक् the letters ट् and क् are indicatory. The ट् shows that the feminine is formed by ई, and क् causing elision of the penultimate अ of हन्. Thus जाया + हन् + टक् = जाया + ह्न् + अ 6.4.98 = जायाघ्नः 7.3.54.

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