The short i is the substitute of the final a of ka when the affix is added.,
Thus क + अण् = कि + अण् = कै + अ = कायं \oblation sacred to Ka\. As कायं हविः, कायमेककपालं निर्वपेत् ॥,
Adhyāya 4 · Pāda 2 · Rule 25
The short i is the substitute of the final a of ka when the affix is added.,
Thus क + अण् = कि + अण् = कै + अ = कायं \oblation sacred to Ka\. As कायं हविः, कायमेककपालं निर्वपेत् ॥,