Meaning of the Sanskrit Word: rudraih

  rudraih—by the eleven Rudras    SB 6.7.2, SB 6.7.3, SB 6.7.4, SB 6.7.5, SB 6.7.6, SB 6.7.7, SB 6.7.8, SB 6.7.2-8
  rudraih—by the Rudras    SB 6.10.17, SB 6.10.18, SB 6.10.17-18

Can't find any compound Sanskrit words containing rudraih.