Meaning of the Sanskrit Word: senayoh

  senayoḥ—of the armies    Bg 1.21-22, Bg 1.26, Bg 2.10
  senayoḥ—of armies    Bg 1.24
  senayoḥ—of the two parties of soldiers    SB 8.10.10-12

Can't find any compound Sanskrit words containing senayoh.