This substitution of kā and kava for ku takes place in the chandas (Vedas) before patha,
Thus कवपथः, कापथः and कुपथः ॥,
Adhyāya 6 · Pāda 3 · Rule 108
This substitution of kā and kava for ku takes place in the chandas (Vedas) before patha,
Thus कवपथः, कापथः and कुपथः ॥,