Meaning of the Sanskrit Word: pratisankramah

  pratisaṅkramaḥ—ultimate destruction    SB 2.8.21
  pratisaṅkramaḥ—dissolutions    SB 3.7.37
  pratisaṅkramaḥ—annihilation.    SB 3.10.14

Can't find any compound Sanskrit words containing pratisankramah.