4.2.59
तदधीते तद्वेद
Operational rule vidhi
The affix अण् -- प्राग्दीव्यतोऽण् (4.1.83) comes after a word denoting 'some subject of study' in the sense of 'who has studied that or who understands that'.
Word by word (padaccheda)
Object तत् dvitīyā · ekavacanaVerb अधीते tiṅantaObject तत् dvitīyā · ekavacanaVerb वेद tiṅanta
- Object Dvitīyā (2nd case).
- Verb A finite verb form (tiṅanta).
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Full reading
तत् अधीते तत् वेद
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix अण् -- प्राग्दीव्यतोऽण् 4.1.83 comes after a word denoting 'some subject of study' in the sense of 'who has studied that or who understands that'.
In others words, the sutra means that the affix is added to a word in the accusative case in construction, denoting a person who studies or knows, that. As छन्दोऽधीते = छान्दसः 'who studies Prosody'. वैयाकरणः 7.3.3 'who knows grammar'. So also नैरुक्तः, नैमित्तः 'who knows the causes'. भौहूर्त्तः, औत्पातः ॥ The word तद् is repeated in this sutra, in order to show a distinction between one who studies and who understands.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.