Pāṇini sūtras

The affix khañ comes after the word aśva, in the genitive case in construction, the sense being ‘what is travelled over or traversed in one day’.

1. aśvasya+eka+aha+gamaḥअश्वस्य+एक+अह+गमः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aśvaअश्व	aśvasyaअश्वस्य	aśva [word]अश्व [wओर्द्]	aśvअश्व् + plus asyaअस्य
   eए	ekaएक	ekaएक	one	ekaएक
   aअ	ahaअह	ahaअह	day	ahअह् + plus aअ
   gग्	gamaगम	gamaḥगमः	going	gamगम् + plus aḥअः

Anuvṛtti

1. khañखञ् 5·2·18

   Part	Lexeme	Sandhi form	Meaning	Stem
   kक्	khañखञ्	khañखञ्	khañखञ्	khañखञ्