The affix ac comes after the verb arha 'to respect', when the object is in composition with it.,
This debars अण्. The words so formed are especially of feminine gender. As पूजार्हा 'deserving of respect'; so also गन्धार्हा, मालार्हा ।,
अर्हः
Adhyāya 3 · Pāda 2 · Rule 12