5.4.159
नाडीतन्त्र्योः स्वाङ्गे
Operational rule vidhi
The affix कप् does not come after the words नाडी and तन्त्री final in a बहुव्रीहि समास when they mean organs of the body.
Word by word (padaccheda)
Target नाडीतन्त्र्योः ṣaṣṭhī · dvivacanaRight context स्वाङ्गे saptamī · ekavacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- 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").
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Full reading
नाडीतन्त्र्योः स्वाङ्गे
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Commentary
The affix कप् does not come after the words नाडी and तन्त्री final in a बहुव्रीहि समास when they mean organs of the body.
Thus बह्व्योः नाड्योऽस्य = बहुनाडिः कायः, बहुतन्त्रीर्ग्रीवा ॥ The word तन्त्री means 'artery'. Why do we say meaning "parts of body"? Observe, बहुनाडीकः स्तम्भः, बहुतन्त्रीका वीणा ॥ The word नाडी is a feminine word formed by ङीप् that comes after jati; तन्त्री is formed by the unadi affix ई (un III.158). In बहुनाडिः the long ई is shortened as being an upasarjana 1.2.48; but the ई of तन्त्री is not shortened, as ई here is not a feminine affx, but a krit affix (कृत् स्त्रियाः प्रतिषेधः; See 1.2.48 also).
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.