The affix ra comes in the sense of 'agent having such a habit etc.' after the verbs 1. nama 'to bow' 2. kmap 'to shake' 3. smi 'to smile' 4. ajas 'not to cease' 5. kama 'to desire' 6. hiṃsa 'to injure' 7. dīpa 'to shine'.,
Thus, नम्रं काष्ठं 'soft wood'; कम्प्रा शाखा 'shaking branch'; स्मेरं मुखं 'smiling face'; अशस्त्रं जुहोति 'he sacrifices perpetually'; कम्रा युवती 'a beautiful maiden'; हिंस्रं रक्षः 'the injuring Rakshas'; दीप्रं काष्ठं 'brilliant wood'.
The word अजस्रं is an adverb, and is derived from the root जस् 'to set free', with the negative particle अ, and the affix र; as अ + जस् + र = अजस्रं ।,