6.2.121
कूलतीरतूलमूलशालाऽक्षसममव्ययीभावे
Operational rule vidhi
In an अव्ययीभाव समास the following second terms have acute accent (उदात्त) on their first syllable - 1. कूल 2. तीर 3. तूल 4. मूल 5. शाला 6. अक्ष and 7. सम.
Word by word (padaccheda)
Substitute / term कूल- तीर- तूल- मूल- शाला- अक्ष- समम् prathamā · ekavacanaRight context saptamī · ekavacana
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
- 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
कूल-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
In an अव्ययीभाव समास the following second terms have acute accent (उदात्त) on their first syllable - 1. कूल 2. तीर 3. तूल 4. मूल 5. शाला 6. अक्ष and 7. सम।
Thus परिकू꣡लम्, उपकू꣡लम्, परिती꣡रम्, उपती꣡रम्, परितू꣡लम्, उपतू꣡लम्, परिमू꣡लम्, उपमू꣡लम्, परिशी꣡लम्, उपशा꣡लम्, उपा꣡क्षम्, पर्यक्षम्, सुष꣡मम्, विष꣡मम्, निष꣡मम् and दुःष꣡मम् ॥ These last four are to be found in Tishthadgu class of compounds 2.1.17. Why do we say 'कूल &c'? Observe उपकुम्भम् ॥ Why do we say "in an Avyayibhava compound?" Observe परमकूलम्, उत्तमकूलम् ॥ After the prepositions परि, प्रति, उप and अप, the words कूल &c would have become accentless by 6.2.33, the present sutra supersedes 6.2.33, and we have accent on कूल &c and not on the Prepositions.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.