Meaning of the Sanskrit Word: bhallaih

  bhallaih—with lances    SB 8.10.36
  bhallaih—by his arrows    SB 4.10.18, SB 4.10.19, SB 4.10.18-19
  bhallaih—by arrows    SB 9.6.17
  bhallaih—with another type of arrow    SB 8.10.42

Can't find any compound Sanskrit words containing bhallaih.