शब्ददर्दुरं करोति

Operational rule vidhi

The affix ठक् comes after a word in the Accusative -2nd case in construction when the sense is 'who makes a sound or croaking'.

Word by word (padaccheda)

Object शब्द- दर्दुरम् dvitīyā · ekavacanaVerb करोति tiṅanta

Object Dvitīyā (2nd case).
Verb A finite verb form (tiṅanta).

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

Full reading

शब्द-दर्दुरम् करोति

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

Commentary

The affix ठक् comes after a word in the Accusative -2nd case in construction when the sense is 'who makes a sound or croaking'.
Thus शब्दं करोति = शाब्दिकः 'who makes a sound' i. e. a Grammarian. So दार्दुरिकः 'who makes a croaking noise like a frog (dardura)' i. e, a potter.

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