3.1.123
छन्दसि निष्टर्क्यदेवहूयप्रणीयोन्नीयोच्छिष्यमर्यस्तर्याध्वर्यखन्यखान्यदेवयज्यापृच्छ्यप्रतिषीव्यब्रह्मवाद्यभाव्यस्ताव्योपचाय्यपृडानि
Operational rule vidhi
In the छन्दस् (Vedas) the following words are found, which are formed irregularly - निष्टर्क्य , देवहूय , प्रणीय , उन्नीय , उच्छिष्य , मर्य , स्तर्या , ध्वर्य , खन्य , खान्य , देवयज्या , आपृच्छ्य , प्रतिषीव्य , ब्रह्मवाद्य , भाव्य , स्ताव्य , and पचाय्यपृड.
Word by word (padaccheda)
Right context छन्दसि saptamī · ekavacanaSubstitute / term निष्टर्क्य- देवहूय- प्रणीय- उन्नीय- उच्छिष्य- मर्य- स्तर्या- ध्वर्य- खन्य- खान्य- देवयज्या- आपृच्छ्य- प्रतिषीव्य- ब्रह्मवाद्य- भाव्य- स्ताव्य- उपचाय्यपृडानि prathamā · bahuvacana
- 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").
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
Dotted words are technical terms. Hover or tap one to see its card.
Full reading
छन्दसि निष्टर्क्य-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
In the छन्दस् (Vedas) the following words are found, which are formed irregularly - निष्टर्क्य , देवहूय , प्रणीय , उन्नीय , उच्छिष्य , मर्य , स्तर्या , ध्वर्य , खन्य , खान्य , देवयज्या , आपृच्छ्य , प्रतिषीव्य , ब्रह्मवाद्य , भाव्य , स्ताव्य , and पचाय्यपृड।
The formation of the above words are extremely irregular and they are all met with in the Vedic literature only. Thus the word निष्टर्क्य is derived from the root कृत् 'to cut', with the preposition निस्, and the affix ण्यत्, instead of क्यप् which is the regular affix, by 110; निः + कृत् + ण्वत् = निः + तृक् + य (the root कृत् transformed into तृक् by transposition) = निष्टर्क्य. As निष्टर्क्ये चिन्वीत् पशुकामः.
The above is apparently a guess-work etymology of grammarians.
So also देवहूय is formed by adding to the root हूयते 'to call' or हू 'to invoke', the affix क्यप् and the upapada देव; the vowel of the root is then lengthened and the augment त (VI.I.71), is not allowed, देव + है or हू + क्यप् = देवहूयः So also प्र + नी (to lead) + क्यप् = प्रणीयः; उत् + नी + क्यप् = उन्नीयः, उत् + शिष् (to leave) + क्यप् = उच्छिष्यम्; मृ (to die) + यत् = मर्यः; स्तृ (to cover) + यत् = स्तर्या; it is always feminine. ध्वृ (to bend) + यत् = ध्वर्यः; खन् (to dig) + यत् = खन्यः; खन् + ण्यत् = खान्यः; देव (God) + यज् (to sacrifice) + यत् = देवयज्या; always used as feminine. आ + पृच्छ् (to ask) + क्यप् = आपृच्छ्यः, प्रति + सीव (to sew) + क्यप् = प्रतिषीव्यः; ब्रह्मण् + वद् (to speak) + ण्यत् = ब्रह्मवाद्यः; भू (to be) + ण्यत् = भाव्यः; स्तु (to praise) + ण्यत् = स्ताव्यः; उप + चि (to collect) + ण्यत् + पृडं = उपचाय्यपृडम्. This last word is formed then only when the word पृड follows: and when the sense is that of 'gold'. When it does not mean 'gold', the form is उपचेयपृडम् ।
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.