Meaning of the Sanskrit Word: udanvatah

  udanvataḥ—devastation    SB 1.6.29
  udanvataḥ—of the sea    SB 4.30.44
  udanvataḥ—from the Garbhodaka Ocean    SB 5.18.39
  udanvataḥ—of the ocean of milk    SB 8.10.5

Can't find any compound Sanskrit words containing udanvatah.