उपसर्गव्यपेतं च

Operational rule vidhi

A finite verb loses its accent when it denotes 'praise' and is joined immediately with यावत् and यथा through the intervention of an उपसर्ग (verbal Preposition).

Word by word (padaccheda)

Substitute / term उपसर्गव्यपेतम् prathamā · ekavacanaIndeclinable च avyaya

Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
Indeclinable An avyaya such as च "and", वा "optionally", न "not".

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Full reading

उपसर्गव्यपेतम् च

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

Commentary

A finite verb loses its accent when it denotes 'praise' and is joined immediately with यावत् and यथा through the intervention of an उपसर्ग (verbal Preposition).
The last sutra taught that the verb loses its accent when immediately preceded by यावत् and यथा ॥ This qualifies the word 'immediately' and teaches that the intervention of a Preposition does not debar immediateness. Thus यथा प्रकरोति चारु, यथा प्रपचति शोभनं, यावत् प्रकरोति चारु, यावत् प्रपचति शोभनम् ॥

The word 'immediately' is understood here also. Thus यावद् देवदत्तः प्रप꣡चति, शोभनं, यथा विष्णुमित्रः प्रकरोति चारु ॥ The upasarga प्र has udatta accent. Prof. Bohtlingk's Edition reads the sutra as व्यपेतं ॥

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