Meaning of the Sanskrit Word: bhallaih

  bhallaiḥ—by his arrows    SB 4.10.18-19
  bhallaiḥ—with lances    SB 8.10.36
  bhallaiḥ—with another type of arrow    SB 8.10.42
  bhallaiḥ—by arrows    SB 9.6.17

Can't find any compound Sanskrit words containing bhallaih.