शीतोष्णाभ्यां कारिणि

Operational rule vidhi

The affix कन् comes in the sense of 'who goes to work thus' after the words शीत and उष्ण.

Word by word (padaccheda)

Left context शीत- उष्णाभ्याम् pañcamī · dvivacanaRight context कारिणि saptamī · ekavacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
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

शीत-उष्णाभ्याम् कारिणि

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

Commentary

The affix कन् comes in the sense of 'who goes to work thus' after the words शीत and उष्ण।
The word शीत and उष्ण being used as adverbs will be in accusative construction. As शीतं करोति 'who goes to work coldly' i.e. a lazy man = शीतकः = अलसः, जडः. Similarly उष्णकः = शीघ्रकारी, दक्षः 'who goes to work hotly'.

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