Meaning of the Sanskrit Word: parasvadhaih

  paraśvadhaiḥ—and lances    SB 4.10.11-12
  paraśvadhaiḥ—by axes    SB 6.10.23
  paraśvadhaiḥ—with the weapons called paraśvadha    SB 8.10.36

Can't find any compound Sanskrit words containing parasvadhaih.