underwater in Portuguese
underwater in Portuguese
submarino
(not comparable) Beneath the surface of the water; of or pertaining to the region beneath the water surface.
subaquático
(not comparable) Beneath the surface of the water; of or pertaining to the region beneath the water surface.
submarinho
(not comparable) Beneath the surface of the water; of or pertaining to the region beneath the water surface.
debaixo d'água
So as to go beneath the surface of the water.