ये च

Operational rule vidhi

The उकार occurring at end of a प्रत्यय that is attached to the verb root कृ is removed when followed by a यकार.

Word by word (padaccheda)

Right context ये saptamī · ekavacanaIndeclinable च avyaya

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").
Indeclinable An avyaya such as च "and", वा "optionally", न "not".

Dotted words are technical terms. Hover or tap one to see its card.

Full reading

ये च

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

Commentary

The affix उ of the अङ्ग (stem) कुरु is always elided before a personal ending beginning with a य्।
Thus कुर्यात्, कुर्याताम् and कुर्युः ॥ The augment यासुट् is treated here as an affix, and it makes the personal ending to which it is added, as an affix beginning with य ॥

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