Meaning of the Sanskrit Word: nastam

  nastam—after being lost    SB 9.12.6
  nastam—was annihilated    SB 9.15.16
  nastam—destroyed    Madhya 6.255
  nastam—lost    SB 2.2.1
  nastam—which was lost    SB 4.28.64

Can't find any compound Sanskrit words containing nastam.