Meaning of the Sanskrit Word: akarunah

  akaruṇaḥ—merciless    SB 6.11.15
  akaruṇaḥ—most unkind    SB 7.2.53
  akaruṇaḥ—who is inhumane and merciless    SB 7.15.10
  akaruṇāḥ—merciless    SB 9.14.37

Can't find any compound Sanskrit words containing akarunah.