Meaning of the Sanskrit Word: sisoh

  śiśoḥ—of the child    SB 10.7.7, SB 10.7.18
  śiśoḥ—in the mouth of the child    SB 10.6.10
  śiśoḥ—for the baby    SB 10.6.42

Can't find any compound Sanskrit words containing sisoh.