प्राग्वतेष्ठञ्

Heading adhikāra प्राग्वतीयः ठञधिकारः

The ठञ् प्रत्यय is used as a default for the प्राग्वतीय meanings.

Word by word (padaccheda)

Indeclinable प्राक् avyayaFrom / after वतेः pañcamī · ekavacanaTerm / subject prathamā · ekavacana

Indeclinable An avyaya such as च "and", वा "optionally", न "not".
From / after Pañcamī (5th case): "from X" or "after X"; in headings, often the limit of their scope.
Term / subject Prathamā (1st case): the term being defined, or the subject of the statement.

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

प्राक् वतेः ठञ्

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

Commentary

Up to sutra 5.1.115 (excluding that) the affix ठञ् (+/- इक or +/- क) bears rule.
The affix ठञ् governs all the succeeding sutras upto तेन त्य्ल्यं क्रिय चेद्वात, and has the senses given to it in Sutras 5.1.37 &c. Strictly speaking the affix ठञ् governs only upto 5.1.110 and not upto 5.1.115. Thus in Sutra 5.1.72, the affix ठञ् must be read as पारायणिकः, तौरायणिकः, चान्द्रायणिकः ॥

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