The affix kmarac comes in the sense of 'agent having such a habit etc.' comes after the verbs 1. sṛ 'to flow' 2. ghasi 'to eat' 3. ad 'to eat'.,
As सृमरः 'going, a kind of deer'; घस्मरः 'gluttonous'; अद्मरः 'voracious'.,
सृ-घस्य्-अदः क्मरच्
Adhyāya 3 · Pāda 2 · Rule 160